129787988121

Names of 129787988121

• Cardinal: 129787988121 can be written as One hundred twenty-nine billion, seven hundred eighty-seven million, nine hundred eighty-eight thousand, one hundred twenty-one.

Scientific notation

• Scientific notation: 1.29787988121 × 10¹¹

Factors of 129787988121

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1227

Divisors of 129787988121

• Number of divisors d(n): 63
• Complete list of divisors:
  1 3 9 11 27 33 81 99 121 243 297 363 729 891 1089 1213 2673 3267 3639 8019 9801 10917 13343 29403 32751 40029 88209 98253 120087 146773 294759 360261 440319 884277 1080783 1320957 1471369 3242349 3962871 4414107 9727047 11888613 13242321 16185059 35665839 39726963 48555177 106997517 119180889 145665531 178035649 357542667 436996593 534106947 1072628001 1310989779 1602320841 3932969337 4806962523 11798908011 14420887569 43262662707 129787988121
• Sum of all divisors σ(n): 214067918127
• Sum of proper divisors (its aliquot sum) s(n): 84279930006
• 129787988121 is a deficient number, because the sum of its proper divisors (84279930006) is less than itself. Its deficiency is 45508058115

Bases of 129787988121

• Binary: 1111000110111111101111000100010011001₂
• Hexadecimal: 0x1E37F78899
• Base-36: 1NMGF0K9

Squares and roots of 129787988121

• 129787988121 squared (129787988121²) is 16844921860496837110641
• 129787988121 cubed (129787988121³) is 2186268518329336714073946070695561
• 129787988121 is a perfect square number. Its square root is 360261
• The cube root of 129787988121 is 5063.0416510823

Scales and comparisons

• 129,787,988,121 seconds is equal to 4,126 years, 44 weeks, 3 days, 18 hours, 55 minutes, 21 seconds.
• To count from 1 to 129,787,988,121 would take you about eight thousand, two hundred fifty-three 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 129787988121 cubic inches would be around 421.9 feet tall.

Recreational maths with 129787988121

• 129787988121 backwards is 121889787921
• The number of decimal digits it has is: 12
• The sum of 129787988121's digits is 63
• More coming soon!