321320313220 has 24 divisors (see below), whose sum is σ = 675922209984. Its totient is φ = 128309162976.

The previous prime is 321320313217. The next prime is 321320313239. The reversal of 321320313220 is 22313023123.

It is a junction number, because it is equal to n+sod(n) for n = 321320313191 and 321320313200.

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, 13673112 + ... + 13696591.

It is an arithmetic number, because the mean of its divisors is an integer number (28163425416).

Almost surely, 2^321320313220 is an apocalyptic number.

It is an amenable number.

321320313220 is an abundant number, since it is smaller than the sum of its proper divisors (354601896764).

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

321320313220 is a wasteful number, since it uses less digits than its factorization.

321320313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27370299 (or 27370297 counting only the distinct ones).

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

Adding to 321320313220 its reverse (22313023123), we get a palindrome (343633336343).

The spelling of 321320313220 in words is "three hundred twenty-one billion, three hundred twenty million, three hundred thirteen thousand, two hundred twenty".