31023023121012 has 72 divisors (see below), whose sum is σ = 79553519675616. Its totient is φ = 9403074705024.

The previous prime is 31023023121007. The next prime is 31023023121031. The reversal of 31023023121012 is 21012132032013.

It is a self number, because there is not a number n which added to its sum of digits gives 31023023121012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114023443 + ... + 114295194.

Almost surely, 2^{31023023121012} is an apocalyptic number.

It is an amenable number.

31023023121012 is an abundant number, since it is smaller than the sum of its proper divisors (48530496554604).

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

31023023121012 is a wasteful number, since it uses less digits than its factorization.

31023023121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228318737 (or 228318722 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31023023121012 its reverse (21012132032013), we get a palindrome (52035155153025).

The spelling of 31023023121012 in words is "thirty-one trillion, twenty-three billion, twenty-three million, one hundred twenty-one thousand, twelve".