312494137921 has 32 divisors (see below), whose sum is σ = 387234432000. Its totient is φ = 246107676672.

The previous prime is 312494137913. The next prime is 312494137931. The reversal of 312494137921 is 129731494213.

It is a cyclic number.

It is not a de Polignac number, because 312494137921 - 2³ = 312494137913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312494137931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 649945 + ... + 1023433.

It is an arithmetic number, because the mean of its divisors is an integer number (12101076000).

Almost surely, 2^312494137921 is an apocalyptic number.

It is an amenable number.

312494137921 is a deficient number, since it is larger than the sum of its proper divisors (74740294079).

312494137921 is a wasteful number, since it uses less digits than its factorization.

312494137921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373681.

The product of its digits is 326592, while the sum is 46.

The spelling of 312494137921 in words is "three hundred twelve billion, four hundred ninety-four million, one hundred thirty-seven thousand, nine hundred twenty-one".