313130020321 has 2 divisors, whose sum is σ = 313130020322. Its totient is φ = 313130020320.

The previous prime is 313130020319. The next prime is 313130020327. The reversal of 313130020321 is 123020031313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312458640400 + 671379921 = 558980^2 + 25911^2 .

It is a cyclic number.

It is not a de Polignac number, because 313130020321 - 2¹ = 313130020319 is a prime.

Together with 313130020319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (313130020327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156565010160 + 156565010161.

It is an arithmetic number, because the mean of its divisors is an integer number (156565010161).

Almost surely, 2^313130020321 is an apocalyptic number.

It is an amenable number.

313130020321 is a deficient number, since it is larger than the sum of its proper divisors (1).

313130020321 is an equidigital number, since it uses as much as digits as its factorization.

313130020321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 313130020321 its reverse (123020031313), we get a palindrome (436150051634).

The spelling of 313130020321 in words is "three hundred thirteen billion, one hundred thirty million, twenty thousand, three hundred twenty-one".