13231320102821 has 2 divisors, whose sum is σ = 13231320102822. Its totient is φ = 13231320102820.

The previous prime is 13231320102809. The next prime is 13231320102827. The reversal of 13231320102821 is 12820102313231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12848389336225 + 382930766596 = 3584465^2 + 618814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13231320102821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231320102827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615660051410 + 6615660051411.

It is an arithmetic number, because the mean of its divisors is an integer number (6615660051411).

Almost surely, 2^{13231320102821} is an apocalyptic number.

It is an amenable number.

13231320102821 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231320102821 is an equidigital number, since it uses as much as digits as its factorization.

13231320102821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 13231320102821 in words is "thirteen trillion, two hundred thirty-one billion, three hundred twenty million, one hundred two thousand, eight hundred twenty-one".