1310131021321 has 2 divisors, whose sum is σ = 1310131021322. Its totient is φ = 1310131021320.

The previous prime is 1310131021307. The next prime is 1310131021333. The reversal of 1310131021321 is 1231201310131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 750718273600 + 559412747721 = 866440^2 + 747939^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310131021321 - 2¹⁹ = 1310130497033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1310131021421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655065510660 + 655065510661.

It is an arithmetic number, because the mean of its divisors is an integer number (655065510661).

Almost surely, 2^{1310131021321} is an apocalyptic number.

It is an amenable number.

1310131021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310131021321 is an equidigital number, since it uses as much as digits as its factorization.

1310131021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1310131021321 its reverse (1231201310131), we get a palindrome (2541332331452).

The spelling of 1310131021321 in words is "one trillion, three hundred ten billion, one hundred thirty-one million, twenty-one thousand, three hundred twenty-one".