31021210012 has 24 divisors (see below), whose sum is σ = 58467838016. Its totient is φ = 14316308928.

The previous prime is 31021210007. The next prime is 31021210043. The reversal of 31021210012 is 21001212013.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 31021209974 and 31021210001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231213 + ... + 1256155.

Almost surely, 2^31021210012 is an apocalyptic number.

It is an amenable number.

31021210012 is a deficient number, since it is larger than the sum of its proper divisors (27446628004).

31021210012 is a wasteful number, since it uses less digits than its factorization.

31021210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48877 (or 48875 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31021210012 its reverse (21001212013), we get a palindrome (52022422025).

The spelling of 31021210012 in words is "thirty-one billion, twenty-one million, two hundred ten thousand, twelve".