313013032121 has 4 divisors (see below), whose sum is σ = 313349968500. Its totient is φ = 312676095744.

The previous prime is 313013032091. The next prime is 313013032127. The reversal of 313013032121 is 121230310313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12779172025 + 300233860096 = 113045^2 + 547936^2 .

It is a cyclic number.

It is not a de Polignac number, because 313013032121 - 2³⁸ = 38135125177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313013032093 and 313013032102.

It is not an unprimeable number, because it can be changed into a prime (313013032127) 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, 168466796 + ... + 168468653.

It is an arithmetic number, because the mean of its divisors is an integer number (78337492125).

Almost surely, 2^313013032121 is an apocalyptic number.

It is an amenable number.

313013032121 is a deficient number, since it is larger than the sum of its proper divisors (336936379).

313013032121 is an equidigital number, since it uses as much as digits as its factorization.

313013032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336936378.

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

Adding to 313013032121 its reverse (121230310313), we get a palindrome (434243342434).

The spelling of 313013032121 in words is "three hundred thirteen billion, thirteen million, thirty-two thousand, one hundred twenty-one".