311312012120 has 16 divisors (see below), whose sum is σ = 700452027360. Its totient is φ = 124524804832.

The previous prime is 311312012107. The next prime is 311312012173. The reversal of 311312012120 is 21210213113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3891400112 + ... + 3891400191.

It is an arithmetic number, because the mean of its divisors is an integer number (43778251710).

Almost surely, 2^311312012120 is an apocalyptic number.

It is an amenable number.

311312012120 is an abundant number, since it is smaller than the sum of its proper divisors (389140015240).

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

311312012120 is a wasteful number, since it uses less digits than its factorization.

311312012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782800314 (or 7782800310 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 311312012120 its reverse (21210213113), we get a palindrome (332522225233).

The spelling of 311312012120 in words is "three hundred eleven billion, three hundred twelve million, twelve thousand, one hundred twenty".