1221253020

Names of 1221253020

• Cardinal: 1221253020 can be written as One billion, two hundred twenty-one million, two hundred fifty-three thousand and twenty.

Scientific notation

• Scientific notation: 1.22125302 × 10⁹

Factors of 1221253020

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 521926

Divisors of 1221253020

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 30 36 39 45 52 60 65 78 90 117 130 156 180 195 234 260 390 468 585 780 1170 2340 521903 1043806 1565709 2087612 2609515 3131418 4697127 5219030 6262836 6784739 7828545 9394254 10438060 13569478 15657090 18788508 20354217 23485635 27138956 31314180 33923695 40708434 46971270 61062651 67847390 81416868 93942540 101771085 122125302 135694780 203542170 244250604 305313255 407084340 610626510 1221253020
• Sum of all divisors σ(n): 3989434176
• Sum of proper divisors (its aliquot sum) s(n): 2768181156
• 1221253020 is an abundant number, because the sum of its proper divisors (2768181156) is greater than itself. Its abundance is 1546928136

Bases of 1221253020

• Binary: 1001000110010101101011110011100₂
• Hexadecimal: 0x48CAD79C
• Base-36: K73OV0

Squares and roots of 1221253020

• 1221253020 squared (1221253020²) is 1491458938859120400
• 1221253020 cubed (1221253020³) is 1821448733287696143043608000
• The square root of 1221253020 is 34946.4307190305
• The cube root of 1221253020 is 1068.8954216811

Scales and comparisons

• 1,221,253,020 seconds is equal to 38 years, 43 weeks, 1 day, 20 hours, 57 minutes.
• To count from 1 to 1,221,253,020 would take you about seventy-seven years!

  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 1221253020 cubic inches would be around 89.1 feet tall.

Recreational maths with 1221253020

• 1221253020 backwards is 0203521221
• 1221253020 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 1221253020's digits is 18
• More coming soon!