31113212212 has 12 divisors (see below), whose sum is σ = 54752302080. Its totient is φ = 15469697336.

The previous prime is 31113212189. The next prime is 31113212227. The reversal of 31113212212 is 21221231113.

It is a self number, because there is not a number n which added to its sum of digits gives 31113212212.

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, 21726388 + ... + 21727819.

It is an arithmetic number, because the mean of its divisors is an integer number (4562691840).

Almost surely, 2^31113212212 is an apocalyptic number.

It is an amenable number.

31113212212 is a deficient number, since it is larger than the sum of its proper divisors (23639089868).

31113212212 is a wasteful number, since it uses less digits than its factorization.

31113212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43454390 (or 43454388 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 31113212212 its reverse (21221231113), we get a palindrome (52334443325).

The spelling of 31113212212 in words is "thirty-one billion, one hundred thirteen million, two hundred twelve thousand, two hundred twelve".