313321100321 has 4 divisors (see below), whose sum is σ = 313805368512. Its totient is φ = 312836832132.

The previous prime is 313321100297. The next prime is 313321100357. The reversal of 313321100321 is 123001123313.

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 not a de Polignac number, because 313321100321 - 2¹⁰ = 313321099297 is a prime.

It is a super-2 number, since 2×313321100321² (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 = 313321100293 and 313321100302.

It is not an unprimeable number, because it can be changed into a prime (313321190321) 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, 242133125 + ... + 242134418.

It is an arithmetic number, because the mean of its divisors is an integer number (78451342128).

Almost surely, 2^313321100321 is an apocalyptic number.

It is an amenable number.

313321100321 is a deficient number, since it is larger than the sum of its proper divisors (484268191).

313321100321 is an equidigital number, since it uses as much as digits as its factorization.

313321100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484268190.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 313321100321 its reverse (123001123313), we get a palindrome (436322223634).

The spelling of 313321100321 in words is "three hundred thirteen billion, three hundred twenty-one million, one hundred thousand, three hundred twenty-one".