# 21120

## 21,120 is an even composite number composed of four prime numbers multiplied together.

What does the number 21120 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 64 divisors.

21120 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of sixty-four divisors.

## Prime factorization of 21120:

### 27 × 3 × 5 × 11

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 11)

See below for interesting mathematical facts about the number 21120 from the Numbermatics database.

### Names of 21120

• Cardinal: 21120 can be written as Twenty-one thousand, one hundred twenty.

### Scientific notation

• Scientific notation: 2.112 × 104

### Factors of 21120

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 21

### Divisors of 21120

• Number of divisors d(n): 64
• Complete list of divisors:
• Sum of all divisors σ(n): 73440
• Sum of proper divisors (its aliquot sum) s(n): 52320
• 21120 is an abundant number, because the sum of its proper divisors (52320) is greater than itself. Its abundance is 31200

### Bases of 21120

• Binary: 1010010100000002
• Base-36: GAO

### Squares and roots of 21120

• 21120 squared (211202) is 446054400
• 21120 cubed (211203) is 9420668928000
• The square root of 21120 is 145.3272169967
• The cube root of 21120 is 27.6416929201

### Scales and comparisons

How big is 21120?
• 21,120 seconds is equal to 5 hours, 52 minutes.
• To count from 1 to 21,120 would take you about five hours.

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 21120 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21120

• 21120 backwards is 02112
• 21120 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21120's digits is 6
• More coming soon!