2121615721

Names of 2121615721

• Cardinal: 2121615721 can be written as Two billion, one hundred twenty-one million, six hundred fifteen thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 2.121615721 × 10⁹

Factors of 2121615721

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 46061

Divisors of 2121615721

• Number of divisors d(n): 3
• Complete list of divisors:
  1 46061 2121615721
• Sum of all divisors σ(n): 2121661783
• Sum of proper divisors (its aliquot sum) s(n): 46062
• 2121615721 is a deficient number, because the sum of its proper divisors (46062) is less than itself. Its deficiency is 2121569659

Bases of 2121615721

• Binary: 1111110011101010100100101101001₂
• Hexadecimal: 0x7E754969
• Base-36: Z35L61

Squares and roots of 2121615721

• 2121615721 squared (2121615721²) is 4501253267594349841
• 2121615721 cubed (2121615721³) is 9549929696730792473439450361
• 2121615721 is a perfect square number. Its square root is 46061
• The cube root of 2121615721 is 1284.9579280385

Scales and comparisons

• 2,121,615,721 seconds is equal to 67 years, 23 weeks, 6 days, 17 hours, 42 minutes, 1 second.
• To count from 1 to 2,121,615,721 would take you about one hundred thirty-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 2121615721 cubic inches would be around 107.1 feet tall.

Recreational maths with 2121615721

• 2121615721 backwards is 1275161212
• The number of decimal digits it has is: 10
• The sum of 2121615721's digits is 28
• More coming soon!