321213503320 has 32 divisors (see below), whose sum is σ = 765243936000. Its totient is φ = 120927436288.

The previous prime is 321213503267. The next prime is 321213503411. The reversal of 321213503320 is 23305312123.

It is a super-2 number, since 2×321213503320² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 236185720 + ... + 236187079.

It is an arithmetic number, because the mean of its divisors is an integer number (23913873000).

Almost surely, 2^321213503320 is an apocalyptic number.

It is an amenable number.

321213503320 is an abundant number, since it is smaller than the sum of its proper divisors (444030432680).

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

321213503320 is a wasteful number, since it uses less digits than its factorization.

321213503320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472372827 (or 472372823 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 321213503320 its reverse (23305312123), we get a palindrome (344518815443).

The spelling of 321213503320 in words is "three hundred twenty-one billion, two hundred thirteen million, five hundred three thousand, three hundred twenty".