1313031233321 has 2 divisors, whose sum is σ = 1313031233322. Its totient is φ = 1313031233320.

The previous prime is 1313031233287. The next prime is 1313031233351. The reversal of 1313031233321 is 1233321303131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1158774743296 + 154256490025 = 1076464^2 + 392755^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313031233321 - 2³⁸ = 1038153326377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313031233351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656515616660 + 656515616661.

It is an arithmetic number, because the mean of its divisors is an integer number (656515616661).

Almost surely, 2^{1313031233321} is an apocalyptic number.

It is an amenable number.

1313031233321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313031233321 is an equidigital number, since it uses as much as digits as its factorization.

1313031233321 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 1313031233321 its reverse (1233321303131), we get a palindrome (2546352536452).

The spelling of 1313031233321 in words is "one trillion, three hundred thirteen billion, thirty-one million, two hundred thirty-three thousand, three hundred twenty-one".