1,021 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 1021 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

1021 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 1021:


See below for interesting mathematical facts about the number 1021 from the Numbermatics database.

Names of 1021

  • Cardinal: 1021 can be written as One thousand and twenty-one.

Scientific notation

  • Scientific notation: 1.021 × 103

Factors of 1021

  • Number of distinct prime factors ω(n): 1
  • Total number of prime factors Ω(n): 1
  • Sum of prime factors: 1021

Divisors of 1021

  • Number of divisors d(n): 2
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1022
  • Sum of proper divisors (its aliquot sum) s(n): 1
  • 1021 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1020

Bases of 1021

  • Binary: 11111111012
  • Hexadecimal: 0x3FD
  • Base-36: SD

Squares and roots of 1021

  • 1021 squared (10212) is 1042441
  • 1021 cubed (10213) is 1064332261
  • The square root of 1021 is 31.9530906173
  • The cube root of 1021 is 10.0695156381

Scales and comparisons

How big is 1021?
  • 1,021 seconds is equal to 17 minutes, 1 second.
  • To count from 1 to 1,021 would take you about seventeen minutes.

    This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

  • A cube with a volume of 1021 cubic inches would be around 0.8 feet tall.

Recreational maths with 1021

  • 1021 backwards is 1201
  • The number of decimal digits it has is: 4
  • The sum of 1021's digits is 4
  • More coming soon!

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"Number 1021 - Facts about the integer". Numbermatics.com. 2024. Web. 1 March 2024.

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Numbermatics. (2024). Number 1021 - Facts about the integer. Retrieved 1 March 2024, from https://numbermatics.com/n/1021/

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Numbermatics. 2024. "Number 1021 - Facts about the integer". https://numbermatics.com/n/1021/

The information we have on file for 1021 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

Keywords: Divisors of 1021, math, Factors of 1021, curriculum, school, college, exams, university, Prime factorization of 1021, STEM, science, technology, engineering, physics, economics, calculator, one thousand and twenty-one.

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