311331021112 has 32 divisors (see below), whose sum is σ = 593700030000. Its totient is φ = 153011550208.

The previous prime is 311331021049. The next prime is 311331021163. The reversal of 311331021112 is 211120133113.

It is a self number, because there is not a number n which added to its sum of digits gives 311331021112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5621814 + ... + 5676922.

Almost surely, 2^311331021112 is an apocalyptic number.

It is an amenable number.

311331021112 is a deficient number, since it is larger than the sum of its proper divisors (282369008888).

311331021112 is a wasteful number, since it uses less digits than its factorization.

311331021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67143 (or 67139 counting only the distinct ones).

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

Adding to 311331021112 its reverse (211120133113), we get a palindrome (522451154225).

The spelling of 311331021112 in words is "three hundred eleven billion, three hundred thirty-one million, twenty-one thousand, one hundred twelve".