21299999999999 has 12 divisors (see below), whose sum is σ = 24941640770928. Its totient is φ = 18136234620000.

The previous prime is 21299999999989. The next prime is 21300000000023. The reversal of 21299999999999 is 99999999999212.

It is not a de Polignac number, because 21299999999999 - 2¹⁶ = 21299999934463 is a prime.

It is a super-9 number, since 9×21299999999999⁹ (a number of 121 digits) contains 999999999 as substring.

21299999999999 is a modest number, since divided by 9999999 gives 2129999 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21299999999969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1439376302 + ... + 1439391099.

It is an arithmetic number, because the mean of its divisors is an integer number (2078470064244).

Almost surely, 2^{21299999999999} is an apocalyptic number.

21299999999999 is a deficient number, since it is larger than the sum of its proper divisors (3641640770929).

21299999999999 is a wasteful number, since it uses less digits than its factorization.

21299999999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878767566 (or 2878767559 counting only the distinct ones).

The product of its digits is 125524238436, while the sum is 104.

The spelling of 21299999999999 in words is "twenty-one trillion, two hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".