313022120321 has 4 divisors (see below), whose sum is σ = 314595096000. Its totient is φ = 311449144644.

The previous prime is 313022120263. The next prime is 313022120329. The reversal of 313022120321 is 123021220313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123021220313 = 199 ⋅618197087.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313022120321 is a prime.

It is a super-2 number, since 2×313022120321² (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 = 313022120293 and 313022120302.

It is not an unprimeable number, because it can be changed into a prime (313022120329) 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 3 ways as a sum of consecutive naturals, for example, 786487541 + ... + 786487938.

It is an arithmetic number, because the mean of its divisors is an integer number (78648774000).

Almost surely, 2^313022120321 is an apocalyptic number.

It is an amenable number.

313022120321 is a deficient number, since it is larger than the sum of its proper divisors (1572975679).

313022120321 is a wasteful number, since it uses less digits than its factorization.

313022120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572975678.

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

Adding to 313022120321 its reverse (123021220313), we get a palindrome (436043340634).

The spelling of 313022120321 in words is "three hundred thirteen billion, twenty-two million, one hundred twenty thousand, three hundred twenty-one".