21109121187

Names of 21109121187

• Cardinal: 21109121187 can be written as Twenty-one billion, one hundred nine million, one hundred twenty-one thousand, one hundred eighty-seven.

Scientific notation

• Scientific notation: 2.1109121187 × 10¹⁰

Factors of 21109121187

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 8110

Divisors of 21109121187

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 11 17 21 33 51 61 77 119 121 183 187 231 357 363 427 561 671 847 1037 1281 1309 2013 2057 2541 3111 3927 4697 6171 7259 7381 8011 11407 14091 14399 21777 22143 24033 34221 43197 51667 56077 79849 88121 125477 136187 155001 168231 239547 264363 376431 408561 488671 616847 878339 953309 969331 1466013 1498057 1850541 2635017 2859927 2907993 3420697 4494171 5375381 6785317 8307407 10262091 10486399 16126143 16478627 20355951 24922221 31459197 37627667 49435881 58151849 59129191 91381477 112883001 115350389 174455547 177387573 274144431 346051167 413904337 639670339 1005196247 1241713011 1919011017 3015588741 7036373729 21109121187
• Sum of all divisors σ(n): 38054564352
• Sum of proper divisors (its aliquot sum) s(n): 16945443165
• 21109121187 is a deficient number, because the sum of its proper divisors (16945443165) is less than itself. Its deficiency is 4163678022

Bases of 21109121187

• Binary: 10011101010001100111010000010100011₂
• Hexadecimal: 0x4EA33A0A3
• Base-36: 9P3TQ5F

Squares and roots of 21109121187

• 21109121187 squared (21109121187²) is 445594997287452288969
• 21109121187 cubed (21109121187³) is 9406118798061766642327164286203
• The square root of 21109121187 is 145289.7834914761
• The cube root of 21109121187 is 2763.6946069441

Scales and comparisons

• 21,109,121,187 seconds is equal to 671 years, 10 weeks, 4 days, 12 hours, 46 minutes, 27 seconds.
• To count from 1 to 21,109,121,187 would take you about one thousand, three hundred forty-two 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 21109121187 cubic inches would be around 230.3 feet tall.

Recreational maths with 21109121187

• 21109121187 backwards is 78112190112
• 21109121187 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21109121187's digits is 33
• More coming soon!