320313121 has 4 divisors (see below), whose sum is σ = 320376832. Its totient is φ = 320249412.

The previous prime is 320313113. The next prime is 320313139. The reversal of 320313121 is 121313023.

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: 121313023 = 13 ⋅9331771.

It is a cyclic number.

It is not a de Polignac number, because 320313121 - 2³ = 320313113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320313095 and 320313104.

It is not an unprimeable number, because it can be changed into a prime (320313221) 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, 23601 + ... + 34606.

It is an arithmetic number, because the mean of its divisors is an integer number (80094208).

Almost surely, 2^320313121 is an apocalyptic number.

It is an amenable number.

320313121 is a deficient number, since it is larger than the sum of its proper divisors (63711).

320313121 is an equidigital number, since it uses as much as digits as its factorization.

320313121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63710.

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

The square root of 320313121 is about 17897.2936780956. The cubic root of 320313121 is about 684.2134015180.

Adding to 320313121 its reverse (121313023), we get a palindrome (441626144).

The spelling of 320313121 in words is "three hundred twenty million, three hundred thirteen thousand, one hundred twenty-one".