21031300032012 has 36 divisors (see below), whose sum is σ = 53169963384720. Its totient is φ = 7009442944992.

The previous prime is 21031300031969. The next prime is 21031300032059. The reversal of 21031300032012 is 21023000313012.

21031300032012 is a `hidden beast` number, since 2 + 1 + 0 + 31 + 300 + 0 + 320 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41008243 + ... + 41517930.

Almost surely, 2^{21031300032012} is an apocalyptic number.

It is an amenable number.

21031300032012 is an abundant number, since it is smaller than the sum of its proper divisors (32138663352708).

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

21031300032012 is a wasteful number, since it uses less digits than its factorization.

21031300032012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82533262 (or 82533257 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21031300032012 its reverse (21023000313012), we get a palindrome (42054300345024).

The spelling of 21031300032012 in words is "twenty-one trillion, thirty-one billion, three hundred million, thirty-two thousand, twelve".