321123320 has 32 divisors (see below), whose sum is σ = 825746400. Its totient is φ = 110099328.

The previous prime is 321123307. The next prime is 321123349. The reversal of 321123320 is 23321123.

321123320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 573155 + ... + 573714.

It is an arithmetic number, because the mean of its divisors is an integer number (25804575).

Almost surely, 2^321123320 is an apocalyptic number.

It is an amenable number.

321123320 is an abundant number, since it is smaller than the sum of its proper divisors (504623080).

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

321123320 is a wasteful number, since it uses less digits than its factorization.

321123320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146887 (or 1146883 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321123320 is about 17919.9140622939. The cubic root of 321123320 is about 684.7897982201.

Adding to 321123320 its reverse (23321123), we get a palindrome (344444443).

The spelling of 321123320 in words is "three hundred twenty-one million, one hundred twenty-three thousand, three hundred twenty".