321313221323320 has 64 divisors (see below), whose sum is σ = 725401460044800. Its totient is φ = 128090423491200.

The previous prime is 321313221323203. The next prime is 321313221323329. The reversal of 321313221323320 is 23323122313123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321313221323329) 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, 95593245 + ... + 98897395.

It is an arithmetic number, because the mean of its divisors is an integer number (11334397813200).

Almost surely, 2^{321313221323320} is an apocalyptic number.

It is an amenable number.

321313221323320 is an abundant number, since it is smaller than the sum of its proper divisors (404088238721480).

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

321313221323320 is a wasteful number, since it uses less digits than its factorization.

321313221323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312388 (or 3312384 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 321313221323320 its reverse (23323122313123), we get a palindrome (344636343636443).

The spelling of 321313221323320 in words is "three hundred twenty-one trillion, three hundred thirteen billion, two hundred twenty-one million, three hundred twenty-three thousand, three hundred twenty".