313123232321 has 2 divisors, whose sum is σ = 313123232322. Its totient is φ = 313123232320.

The previous prime is 313123232269. The next prime is 313123232327. The reversal of 313123232321 is 123232321313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291696127921 + 21427104400 = 540089^2 + 146380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313123232321 is a prime.

It is not a weakly prime, because it can be changed into another prime (313123232327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156561616160 + 156561616161.

It is an arithmetic number, because the mean of its divisors is an integer number (156561616161).

Almost surely, 2^313123232321 is an apocalyptic number.

It is an amenable number.

313123232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

313123232321 is an equidigital number, since it uses as much as digits as its factorization.

313123232321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 26.

Adding to 313123232321 its reverse (123232321313), we get a palindrome (436355553634).

The spelling of 313123232321 in words is "three hundred thirteen billion, one hundred twenty-three million, two hundred thirty-two thousand, three hundred twenty-one".