31031302320012 has 48 divisors (see below), whose sum is σ = 73243032528512. Its totient is φ = 10224507502080.

The previous prime is 31031302319999. The next prime is 31031302320041. The reversal of 31031302320012 is 21002320313013.

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, 15491998 + ... + 17380005.

Almost surely, 2^{31031302320012} is an apocalyptic number.

It is an amenable number.

31031302320012 is an abundant number, since it is smaller than the sum of its proper divisors (42211730208500).

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

31031302320012 is a wasteful number, since it uses less digits than its factorization.

31031302320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32872918 (or 32872916 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31031302320012 its reverse (21002320313013), we get a palindrome (52033622633025).

The spelling of 31031302320012 in words is "thirty-one trillion, thirty-one billion, three hundred two million, three hundred twenty thousand, twelve".