321223202320 has 40 divisors (see below), whose sum is σ = 757074698136. Its totient is φ = 126729151488.

The previous prime is 321223202317. The next prime is 321223202323. The reversal of 321223202320 is 23202322123.

It is an interprime number because it is at equal distance from previous prime (321223202317) and next prime (321223202323).

It can be written as a sum of positive squares in 4 ways, for example, as 128863768576 + 192359433744 = 358976^2 + 438588^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 321223202291 and 321223202300.

It is not an unprimeable number, because it can be changed into a prime (321223202323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27496147 + ... + 27507826.

Almost surely, 2^321223202320 is an apocalyptic number.

It is an amenable number.

321223202320 is an abundant number, since it is smaller than the sum of its proper divisors (435851495816).

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

321223202320 is a wasteful number, since it uses less digits than its factorization.

321223202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55004059 (or 55004053 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 321223202320 its reverse (23202322123), we get a palindrome (344425524443).

The spelling of 321223202320 in words is "three hundred twenty-one billion, two hundred twenty-three million, two hundred two thousand, three hundred twenty".