311131023112 has 64 divisors (see below), whose sum is σ = 718128069120. Its totient is φ = 123061932288.

The previous prime is 311131023031. The next prime is 311131023121. The reversal of 311131023112 is 211320131113.

It is a self number, because there is not a number n which added to its sum of digits gives 311131023112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4190698 + ... + 4264294.

It is an arithmetic number, because the mean of its divisors is an integer number (11220751080).

Almost surely, 2^311131023112 is an apocalyptic number.

It is an amenable number.

311131023112 is an abundant number, since it is smaller than the sum of its proper divisors (406997046008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311131023112 is a wasteful number, since it uses less digits than its factorization.

311131023112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79430 (or 79426 counting only the distinct ones).

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

Adding to 311131023112 its reverse (211320131113), we get a palindrome (522451154225).

The spelling of 311131023112 in words is "three hundred eleven billion, one hundred thirty-one million, twenty-three thousand, one hundred twelve".