313120202321 has 4 divisors (see below), whose sum is σ = 313493409600. Its totient is φ = 312746995044.

The previous prime is 313120202287. The next prime is 313120202347. The reversal of 313120202321 is 123202021313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313120202321 is a prime.

It is a super-2 number, since 2×313120202321² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313120202293 and 313120202302.

It is not an unprimeable number, because it can be changed into a prime (313120202221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186602381 + ... + 186604058.

It is an arithmetic number, because the mean of its divisors is an integer number (78373352400).

Almost surely, 2^313120202321 is an apocalyptic number.

It is an amenable number.

313120202321 is a deficient number, since it is larger than the sum of its proper divisors (373207279).

313120202321 is an equidigital number, since it uses as much as digits as its factorization.

313120202321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373207278.

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

Adding to 313120202321 its reverse (123202021313), we get a palindrome (436322223634).

The spelling of 313120202321 in words is "three hundred thirteen billion, one hundred twenty million, two hundred two thousand, three hundred twenty-one".