31200031012 has 12 divisors (see below), whose sum is σ = 54603241840. Its totient is φ = 15599104776.

The previous prime is 31200030977. The next prime is 31200031013. The reversal of 31200031012 is 21013000213.

It is a junction number, because it is equal to n+sod(n) for n = 31200030983 and 31200031001.

It is not an unprimeable number, because it can be changed into a prime (31200031013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147462 + ... + 290077.

Almost surely, 2^31200031012 is an apocalyptic number.

It is an amenable number.

31200031012 is a deficient number, since it is larger than the sum of its proper divisors (23403210828).

31200031012 is a wasteful number, since it uses less digits than its factorization.

31200031012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455370 (or 455368 counting only the distinct ones).

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

Adding to 31200031012 its reverse (21013000213), we get a palindrome (52213031225).

The spelling of 31200031012 in words is "thirty-one billion, two hundred million, thirty-one thousand, twelve".