129721494012

Names of 129721494012

• Cardinal: 129721494012 can be written as One hundred twenty-nine billion, seven hundred twenty-one million, four hundred ninety-four thousand and twelve.

Scientific notation

• Scientific notation: 1.29721494012 × 10¹¹

Factors of 129721494012

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3622

Divisors of 129721494012

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 11 12 22 33 44 66 79 132 158 237 316 474 869 948 1738 2607 3476 3527 5214 7054 10428 10581 14108 21162 38797 42324 77594 116391 155188 232782 278633 465564 557266 835899 1114532 1671798 3064963 3343596 6129926 9194889 12259852 12439729 18389778 24879458 36779556 37319187 49758916 74638374 136837019 149276748 273674038 410511057 547348076 821022114 982738591 1642044228 1965477182 2948215773 3930954364 5896431546 10810124501 11792863092 21620249002 32430373503 43240498004 64860747006 129721494012
• Sum of all divisors σ(n): 334474748160
• Sum of proper divisors (its aliquot sum) s(n): 204753254148
• 129721494012 is an abundant number, because the sum of its proper divisors (204753254148) is greater than itself. Its abundance is 75031760136

Bases of 129721494012

• Binary: 1111000110100000000001110100111111100₂
• Hexadecimal: 0x1E3400E9FC
• Base-36: 1NLCTTDO

Squares and roots of 129721494012

• 129721494012 squared (129721494012²) is 16827666008705351856144
• 129721494012 cubed (129721494012³) is 2182909975384207240679136981409728
• The square root of 129721494012 is 360168.7021549763
• The cube root of 129721494012 is 5062.1768562255

Scales and comparisons

• 129,721,494,012 seconds is equal to 4,124 years, 38 weeks, 4 days, 4 hours, 20 minutes, 12 seconds.
• To count from 1 to 129,721,494,012 would take you about eight thousand, two hundred forty-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 129721494012 cubic inches would be around 421.8 feet tall.

Recreational maths with 129721494012

• 129721494012 backwards is 210494127921
• The number of decimal digits it has is: 12
• The sum of 129721494012's digits is 42
• More coming soon!