21100031440012 has 48 divisors (see below), whose sum is σ = 42255331256320. Its totient is φ = 9031030474752.

The previous prime is 21100031440009. The next prime is 21100031440031. The reversal of 21100031440012 is 21004413000112.

It is a super-2 number, since 2×21100031440012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175447333 + ... + 175567555.

Almost surely, 2^{21100031440012} is an apocalyptic number.

It is an amenable number.

21100031440012 is an abundant number, since it is smaller than the sum of its proper divisors (21155299816308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100031440012 is a wasteful number, since it uses less digits than its factorization.

21100031440012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128390 (or 128388 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21100031440012 its reverse (21004413000112), we get a palindrome (42104444440124).

The spelling of 21100031440012 in words is "twenty-one trillion, one hundred billion, thirty-one million, four hundred forty thousand, twelve".