21121242345

Names of 21121242345

• Cardinal: 21121242345 can be written as Twenty-one billion, one hundred twenty-one million, two hundred forty-two thousand, three hundred forty-five.

Scientific notation

• Scientific notation: 2.1121242345 × 10¹⁰

Factors of 21121242345

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1918

Divisors of 21121242345

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 5 7 9 15 21 27 35 45 47 63 105 135 141 189 235 307 315 329 423 705 921 945 987 1269 1535 1549 1645 2115 2149 2763 2961 4605 4647 4935 6345 6447 7745 8289 8883 10745 10843 13815 13941 14429 14805 19341 23235 32235 32529 41445 41823 43287 44415 54215 58023 69705 72145 72803 96705 97587 101003 129861 162645 209115 216435 218409 290115 292761 303009 364015 389583 475543 487935 505015 509621 649305 655227 909027 1092045 1426629 1463805 1515045 1528863 1947915 1965681 2377715 2548105 2727081 3276135 3328801 4279887 4545135 4586589 7133145 7644315 9828405 9986403 12839661 13635405 13759767 16644005 21399435 22350521 22932945 29959209 49932015 64198305 67051563 68798835 89877627 111752605 149796045 156453647 201154689 335257815 449388135 469360941 603464067 782268235 1005773445 1408082823 2346804705 3017320335 4224248469 7040414115 21121242345
• Sum of all divisors σ(n): 43997184000
• Sum of proper divisors (its aliquot sum) s(n): 22875941655
• 21121242345 is an abundant number, because the sum of its proper divisors (22875941655) is greater than itself. Its abundance is 1754699310

Bases of 21121242345

• Binary: 10011101010111011001001010011101001₂
• Hexadecimal: 0x4EAEC94E9
• Base-36: 9PB1IW9

Squares and roots of 21121242345

• 21121242345 squared (21121242345²) is 446106878196221099025
• 21121242345 cubed (21121242345³) is 9422331486153782295709268213625
• The square root of 21121242345 is 145331.4912364145
• The cube root of 21121242345 is 2764.2234899933

Scales and comparisons

• 21,121,242,345 seconds is equal to 671 years, 30 weeks, 4 days, 19 hours, 45 minutes, 45 seconds.
• To count from 1 to 21,121,242,345 would take you about one thousand, three hundred forty-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 21121242345 cubic inches would be around 230.4 feet tall.

Recreational maths with 21121242345

• 21121242345 backwards is 54324212112
• 21121242345 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21121242345's digits is 27
• More coming soon!