313120321 has 16 divisors (see below), whose sum is σ = 336430080. Its totient is φ = 290695680.

The previous prime is 313120277. The next prime is 313120333. The reversal of 313120321 is 123021313.

It is a cyclic number.

It is not a de Polignac number, because 313120321 - 2⁷ = 313120193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313120295 and 313120304.

It is not an unprimeable number, because it can be changed into a prime (313120351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209545 + ... + 211033.

It is an arithmetic number, because the mean of its divisors is an integer number (21026880).

Almost surely, 2^313120321 is an apocalyptic number.

It is an amenable number.

313120321 is a deficient number, since it is larger than the sum of its proper divisors (23309759).

313120321 is a wasteful number, since it uses less digits than its factorization.

313120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 313120321 is about 17695.2061587312. The cubic root of 313120321 is about 679.0531234397.

Adding to 313120321 its reverse (123021313), we get a palindrome (436141634).

The spelling of 313120321 in words is "three hundred thirteen million, one hundred twenty thousand, three hundred twenty-one".