321100120 has 48 divisors (see below), whose sum is σ = 794137680. Its totient is φ = 116761920.

The previous prime is 321100067. The next prime is 321100159. The reversal of 321100120 is 21001123.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 321100097 and 321100106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28332 + ... + 38011.

It is an arithmetic number, because the mean of its divisors is an integer number (16544535).

Almost surely, 2^321100120 is an apocalyptic number.

It is an amenable number.

321100120 is an abundant number, since it is smaller than the sum of its proper divisors (473037560).

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

321100120 is a wasteful number, since it uses less digits than its factorization.

321100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66376 (or 66361 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 321100120 is about 17919.2667260689. The cubic root of 321100120 is about 684.7733066265.

Adding to 321100120 its reverse (21001123), we get a palindrome (342101243).

The spelling of 321100120 in words is "three hundred twenty-one million, one hundred thousand, one hundred twenty".