312113021320 has 64 divisors (see below), whose sum is σ = 719873406000. Its totient is φ = 121751359488.

The previous prime is 312113021309. The next prime is 312113021357. The reversal of 312113021320 is 23120311213.

It can be written as a sum of positive squares in 8 ways, for example, as 143469743076 + 168643278244 = 378774^2 + 410662^2 .

It is a super-3 number, since 3×312113021320³ (a number of 35 digits) contains 333 as substring.

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, 340615 + ... + 860374.

Almost surely, 2^312113021320 is an apocalyptic number.

It is an amenable number.

312113021320 is an abundant number, since it is smaller than the sum of its proper divisors (407760384680).

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

312113021320 is a wasteful number, since it uses less digits than its factorization.

312113021320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201162 (or 1201158 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 312113021320 its reverse (23120311213), we get a palindrome (335233332533).

The spelling of 312113021320 in words is "three hundred twelve billion, one hundred thirteen million, twenty-one thousand, three hundred twenty".