321921112516 has 12 divisors (see below), whose sum is σ = 564156538540. Its totient is φ = 160733530080.

The previous prime is 321921112511. The next prime is 321921112519. The reversal of 321921112516 is 615211129123.

It can be written as a sum of positive squares in 2 ways, for example, as 155587646916 + 166333465600 = 394446^2 + 407840^2 .

It is not an unprimeable number, because it can be changed into a prime (321921112511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56753355 + ... + 56759026.

Almost surely, 2^321921112516 is an apocalyptic number.

It is an amenable number.

321921112516 is a deficient number, since it is larger than the sum of its proper divisors (242235426024).

321921112516 is a wasteful number, since it uses less digits than its factorization.

321921112516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113513094 (or 113513092 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The spelling of 321921112516 in words is "three hundred twenty-one billion, nine hundred twenty-one million, one hundred twelve thousand, five hundred sixteen".