31111133212 has 6 divisors (see below), whose sum is σ = 54444483128. Its totient is φ = 15555566604.

The previous prime is 31111133173. The next prime is 31111133267. The reversal of 31111133212 is 21233111113.

It is a self number, because there is not a number n which added to its sum of digits gives 31111133212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3888891648 + ... + 3888891655.

Almost surely, 2^31111133212 is an apocalyptic number.

It is an amenable number.

31111133212 is a deficient number, since it is larger than the sum of its proper divisors (23333349916).

31111133212 is a wasteful number, since it uses less digits than its factorization.

31111133212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7777783307 (or 7777783305 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

Adding to 31111133212 its reverse (21233111113), we get a palindrome (52344244325).

The spelling of 31111133212 in words is "thirty-one billion, one hundred eleven million, one hundred thirty-three thousand, two hundred twelve".