321109972 has 12 divisors (see below), whose sum is σ = 562343040. Its totient is φ = 160440536.

The previous prime is 321109933. The next prime is 321109979. The reversal of 321109972 is 279901123.

It is a happy number.

It is a super-2 number, since 2×321109972² = 206223228235681568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321109979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22138 + ... + 33649.

It is an arithmetic number, because the mean of its divisors is an integer number (46861920).

Almost surely, 2^321109972 is an apocalyptic number.

It is an amenable number.

321109972 is a deficient number, since it is larger than the sum of its proper divisors (241233068).

321109972 is a wasteful number, since it uses less digits than its factorization.

321109972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57230 (or 57228 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 321109972 is about 17919.5416236019. The cubic root of 321109972 is about 684.7803099641.

The spelling of 321109972 in words is "three hundred twenty-one million, one hundred nine thousand, nine hundred seventy-two".