321223020320 has 48 divisors (see below), whose sum is σ = 759159656640. Its totient is φ = 128443448064.

The previous prime is 321223020257. The next prime is 321223020337. The reversal of 321223020320 is 23020322123.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 321223020292 and 321223020301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94949 + ... + 807131.

It is an arithmetic number, because the mean of its divisors is an integer number (15815826180).

Almost surely, 2^321223020320 is an apocalyptic number.

It is an amenable number.

321223020320 is an abundant number, since it is smaller than the sum of its proper divisors (437936636320).

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

321223020320 is a wasteful number, since it uses less digits than its factorization.

321223020320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715017 (or 715009 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 321223020320 its reverse (23020322123), we get a palindrome (344243342443).

The spelling of 321223020320 in words is "three hundred twenty-one billion, two hundred twenty-three million, twenty thousand, three hundred twenty".