311111232112 has 20 divisors (see below), whose sum is σ = 617479916256. Its totient is φ = 151761576320.

The previous prime is 311111232077. The next prime is 311111232127. The reversal of 311111232112 is 211232111113.

It is a self number, because there is not a number n which added to its sum of digits gives 311111232112.

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 in 3 ways as a sum of consecutive naturals, for example, 237126808 + ... + 237128119.

Almost surely, 2^311111232112 is an apocalyptic number.

It is an amenable number.

311111232112 is a deficient number, since it is larger than the sum of its proper divisors (306368684144).

311111232112 is a wasteful number, since it uses less digits than its factorization.

311111232112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474254976 (or 474254970 counting only the distinct ones).

The product of its digits is 72, while the sum is 19.

Adding to 311111232112 its reverse (211232111113), we get a palindrome (522343343225).

The spelling of 311111232112 in words is "three hundred eleven billion, one hundred eleven million, two hundred thirty-two thousand, one hundred twelve".