313123344121 has 20 divisors (see below), whose sum is σ = 365376702692. Its totient is φ = 268326880416.

The previous prime is 313123344109. The next prime is 313123344137. The reversal of 313123344121 is 121443321313.

It can be written as a sum of positive squares in 2 ways, for example, as 183238788096 + 129884556025 = 428064^2 + 360395^2 .

It is not a de Polignac number, because 313123344121 - 2⁷ = 313123343993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 313123344121.

It is not an unprimeable number, because it can be changed into a prime (313123344221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11830915 + ... + 11857351.

Almost surely, 2^313123344121 is an apocalyptic number.

It is an amenable number.

313123344121 is a deficient number, since it is larger than the sum of its proper divisors (52253358571).

313123344121 is an frugal number, since it uses more digits than its factorization.

313123344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31398 (or 31377 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 313123344121 its reverse (121443321313), we get a palindrome (434566665434).

The spelling of 313123344121 in words is "three hundred thirteen billion, one hundred twenty-three million, three hundred forty-four thousand, one hundred twenty-one".