321321023320 has 32 divisors (see below), whose sum is σ = 788697058320. Its totient is φ = 116844008320.

The previous prime is 321321023311. The next prime is 321321023321. The reversal of 321321023320 is 23320123123.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 321321023291 and 321321023300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321321023321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365137087 + ... + 365137966.

Almost surely, 2^321321023320 is an apocalyptic number.

It is an amenable number.

321321023320 is an abundant number, since it is smaller than the sum of its proper divisors (467376035000).

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

321321023320 is a wasteful number, since it uses less digits than its factorization.

321321023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730275075 (or 730275071 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 321321023320 its reverse (23320123123), we get a palindrome (344641146443).

The spelling of 321321023320 in words is "three hundred twenty-one billion, three hundred twenty-one million, twenty-three thousand, three hundred twenty".