21121864768128

Names of 21121864768128

• Cardinal: 21121864768128 can be written as Twenty-one trillion, one hundred twenty-one billion, eight hundred sixty-four million, seven hundred sixty-eight thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1121864768128 × 10¹³

Factors of 21121864768128

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 96669917

Divisors of 21121864768128

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 6 8 12 16 24 32 48 64 96 128 192 384 569 1138 1707 2276 3414 4552 6828 9104 13656 18208 27312 36416 54624 72832 109248 218496 96669343 193338686 290008029 386677372 580016058 773354744 1160032116 1546709488 2320064232 3093418976 4640128464 6186837952 9280256928 12373675904 18560513856 37121027712 55004856167 110009712334 165014568501 220019424668 330029137002 440038849336 660058274004 880077698672 1320116548008 1760155397344 2640233096016 3520310794688 5280466192032 7040621589376 10560932384064 21121864768128
• Sum of all divisors σ(n): 56203556601600
• Sum of proper divisors (its aliquot sum) s(n): 35081691833472
• 21121864768128 is an abundant number, because the sum of its proper divisors (35081691833472) is greater than itself. Its abundance is 13959827065344

Bases of 21121864768128

• Binary: 100110011010111010001001111110001101010000000₂
• Hexadecimal: 0x1335D13F1A80
• Base-36: 7HJ90XKLC

Squares and roots of 21121864768128

• 21121864768128 squared (21121864768128²) is 446133171283086891204624384
• 21121864768128 cubed (21121864768128³) is 9423164512417447407541839977157494833152
• The square root of 21121864768128 is 4595852.9967926519
• The cube root of 21121864768128 is 27642.5064274783

Scales and comparisons

• 21,121,864,768,128 seconds is equal to 671,609 years, 50 weeks, 1 day, 9 hours, 48 minutes, 48 seconds.
• To count from 1 to 21,121,864,768,128 would take you about one million, six hundred seventy-nine thousand and twenty-four 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 21121864768128 cubic inches would be around 2303.5 feet tall.

Recreational maths with 21121864768128

• 21121864768128 backwards is 82186746812112
• The number of decimal digits it has is: 14
• The sum of 21121864768128's digits is 57
• More coming soon!