31320330121313 has 2 divisors, whose sum is σ = 31320330121314. Its totient is φ = 31320330121312.

The previous prime is 31320330121279. The next prime is 31320330121319. The reversal of 31320330121313 is 31312103302313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21571872569809 + 9748457551504 = 4644553^2 + 3122252^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320330121313 - 2¹² = 31320330117217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31320330121319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660165060656 + 15660165060657.

It is an arithmetic number, because the mean of its divisors is an integer number (15660165060657).

Almost surely, 2^{31320330121313} is an apocalyptic number.

It is an amenable number.

31320330121313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320330121313 is an equidigital number, since it uses as much as digits as its factorization.

31320330121313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31320330121313 its reverse (31312103302313), we get a palindrome (62632433423626).

The spelling of 31320330121313 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirty million, one hundred twenty-one thousand, three hundred thirteen".