321311013320 has 64 divisors (see below), whose sum is σ = 795190573440. Its totient is φ = 116840349120.

The previous prime is 321311013301. The next prime is 321311013329. The reversal of 321311013320 is 23310113123.

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 = 321311013292 and 321311013301.

It is not an unprimeable number, because it can be changed into a prime (321311013329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2964332 + ... + 3070811.

It is an arithmetic number, because the mean of its divisors is an integer number (12424852710).

Almost surely, 2^321311013320 is an apocalyptic number.

It is an amenable number.

321311013320 is an abundant number, since it is smaller than the sum of its proper divisors (473879560120).

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

321311013320 is a wasteful number, since it uses less digits than its factorization.

321311013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6035187 (or 6035161 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 321311013320 its reverse (23310113123), we get a palindrome (344621126443).

The spelling of 321311013320 in words is "three hundred twenty-one billion, three hundred eleven million, thirteen thousand, three hundred twenty".