312321112120 has 32 divisors (see below), whose sum is σ = 703359702720. Its totient is φ = 124815164800.

The previous prime is 312321112099. The next prime is 312321112123. The reversal of 312321112120 is 21211123213.

It is a super-2 number, since 2×312321112120² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312321112123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3495331 + ... + 3583570.

It is an arithmetic number, because the mean of its divisors is an integer number (21979990710).

Almost surely, 2^312321112120 is an apocalyptic number.

It is an amenable number.

312321112120 is an abundant number, since it is smaller than the sum of its proper divisors (391038590600).

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

312321112120 is a wasteful number, since it uses less digits than its factorization.

312321112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080015 (or 7080011 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 312321112120 its reverse (21211123213), we get a palindrome (333532235333).

The spelling of 312321112120 in words is "three hundred twelve billion, three hundred twenty-one million, one hundred twelve thousand, one hundred twenty".