31112312212 has 6 divisors (see below), whose sum is σ = 54446546378. Its totient is φ = 15556156104.

The previous prime is 31112312201. The next prime is 31112312233. The reversal of 31112312212 is 21221321113.

It can be written as a sum of positive squares in only one way, i.e., 30344246416 + 768065796 = 174196^2 + 27714^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31112312212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3889039023 + ... + 3889039030.

Almost surely, 2^31112312212 is an apocalyptic number.

It is an amenable number.

31112312212 is a deficient number, since it is larger than the sum of its proper divisors (23334234166).

31112312212 is a wasteful number, since it uses less digits than its factorization.

31112312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7778078057 (or 7778078055 counting only the distinct ones).

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

Adding to 31112312212 its reverse (21221321113), we get a palindrome (52333633325).

The spelling of 31112312212 in words is "thirty-one billion, one hundred twelve million, three hundred twelve thousand, two hundred twelve".