21011721007220

Names of 21011721007220

• Cardinal: 21011721007220 can be written as Twenty-one trillion, eleven billion, seven hundred twenty-one million, seven thousand, two hundred twenty.

Scientific notation

• Scientific notation: 2.101172100722 × 10¹³

Factors of 21011721007220

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 60317

Divisors of 21011721007220

• Number of divisors d(n): 54
• Complete list of divisors:
  1 2 4 5 10 17 20 34 68 85 170 289 340 578 1156 1445 2890 5780 60293 120586 241172 301465 602930 1024981 1205860 2049962 4099924 5124905 10249810 17424677 20499620 34849354 69698708 87123385 174246770 348493540 3635245849 7270491698 14540983396 18176229245 36352458490 61799179433 72704916980 123598358866 247196717732 308995897165 617991794330 1050586050361 1235983588660 2101172100722 4202344201444 5252930251805 10505860503610 21011721007220
• Sum of all divisors σ(n): 46873637407842
• Sum of proper divisors (its aliquot sum) s(n): 25861916400622
• 21011721007220 is an abundant number, because the sum of its proper divisors (25861916400622) is greater than itself. Its abundance is 4850195393402

Bases of 21011721007220

• Binary: 100110001110000101100001010101011000001110100₂
• Hexadecimal: 0x131C2C2AB074
• Base-36: 7G4NG6IR8

Squares and roots of 21011721007220

• 21011721007220 squared (21011721007220²) is 441492419685250251292128400
• 21011721007220 cubed (21011721007220³) is 9276515549228961365457598251305567048000
• The square root of 21011721007220 is 4583854.3832914239
• The cube root of 21011721007220 is 27594.3737250431

Scales and comparisons

• 21,011,721,007,220 seconds is equal to 668,107 years, 38 weeks, 1 day, 8 hours, 40 minutes, 20 seconds.
• To count from 1 to 21,011,721,007,220 would take you about one million, six hundred seventy thousand, two hundred sixty-nine 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 21011721007220 cubic inches would be around 2299.5 feet tall.

Recreational maths with 21011721007220

• 21011721007220 backwards is 02270012711012
• The number of decimal digits it has is: 14
• The sum of 21011721007220's digits is 26
• More coming soon!