31231000012 has 6 divisors (see below), whose sum is σ = 54654250028. Its totient is φ = 15615500004.

The previous prime is 31230999977. The next prime is 31231000037. The reversal of 31231000012 is 21000013213.

It is a junction number, because it is equal to n+sod(n) for n = 31230999956 and 31231000001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3903874998 + ... + 3903875005.

Almost surely, 2^31231000012 is an apocalyptic number.

It is an amenable number.

31231000012 is a deficient number, since it is larger than the sum of its proper divisors (23423250016).

31231000012 is a wasteful number, since it uses less digits than its factorization.

31231000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807750007 (or 7807750005 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31231000012 its reverse (21000013213), we get a palindrome (52231013225).

The spelling of 31231000012 in words is "thirty-one billion, two hundred thirty-one million, twelve", and thus it is an aban number.