313221321020 has 24 divisors (see below), whose sum is σ = 658830869424. Its totient is φ = 125085462656.

The previous prime is 313221321001. The next prime is 313221321031. The reversal of 313221321020 is 20123122313.

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 = 313221320983 and 313221321001.

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, 12678962 + ... + 12703641.

It is an arithmetic number, because the mean of its divisors is an integer number (27451286226).

Almost surely, 2^313221321020 is an apocalyptic number.

It is an amenable number.

313221321020 is an abundant number, since it is smaller than the sum of its proper divisors (345609548404).

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

313221321020 is a wasteful number, since it uses less digits than its factorization.

313221321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25383229 (or 25383227 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 313221321020 its reverse (20123122313), we get a palindrome (333344443333).

The spelling of 313221321020 in words is "three hundred thirteen billion, two hundred twenty-one million, three hundred twenty-one thousand, twenty".