31113221110012 has 12 divisors (see below), whose sum is σ = 54449824907016. Its totient is φ = 15556128279440.

The previous prime is 31113221109973. The next prime is 31113221110039. The reversal of 31113221110012 is 21001112231113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120423718 + ... + 120681805.

It is an arithmetic number, because the mean of its divisors is an integer number (4537485408918).

Almost surely, 2^{31113221110012} is an apocalyptic number.

It is an amenable number.

31113221110012 is a deficient number, since it is larger than the sum of its proper divisors (23336603797004).

31113221110012 is a wasteful number, since it uses less digits than its factorization.

31113221110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241137788 (or 241137786 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 31113221110012 its reverse (21001112231113), we get a palindrome (52114333341125).

The spelling of 31113221110012 in words is "thirty-one trillion, one hundred thirteen billion, two hundred twenty-one million, one hundred ten thousand, twelve".