13021320310021 has 2 divisors, whose sum is σ = 13021320310022. Its totient is φ = 13021320310020.

The previous prime is 13021320309947. The next prime is 13021320310049. The reversal of 13021320310021 is 12001302312031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10174575237121 + 2846745072900 = 3189761^2 + 1687230^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021320310021 - 2⁴¹ = 10822297054469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13021320310091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510660155010 + 6510660155011.

It is an arithmetic number, because the mean of its divisors is an integer number (6510660155011).

Almost surely, 2^{13021320310021} is an apocalyptic number.

It is an amenable number.

13021320310021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021320310021 is an equidigital number, since it uses as much as digits as its factorization.

13021320310021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13021320310021 its reverse (12001302312031), we get a palindrome (25022622622052).

The spelling of 13021320310021 in words is "thirteen trillion, twenty-one billion, three hundred twenty million, three hundred ten thousand, twenty-one".