31110231212 has 12 divisors (see below), whose sum is σ = 54560495136. Its totient is φ = 15521518320.

The previous prime is 31110231167. The next prime is 31110231221. The reversal of 31110231212 is 21213201113.

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, 8397239 + ... + 8400942.

It is an arithmetic number, because the mean of its divisors is an integer number (4546707928).

Almost surely, 2^31110231212 is an apocalyptic number.

It is an amenable number.

31110231212 is a deficient number, since it is larger than the sum of its proper divisors (23450263924).

31110231212 is a wasteful number, since it uses less digits than its factorization.

31110231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16798648 (or 16798646 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 31110231212 its reverse (21213201113), we get a palindrome (52323432325).

The spelling of 31110231212 in words is "thirty-one billion, one hundred ten million, two hundred thirty-one thousand, two hundred twelve".