13004512320421 has 2 divisors, whose sum is σ = 13004512320422. Its totient is φ = 13004512320420.

The previous prime is 13004512320413. The next prime is 13004512320433. The reversal of 13004512320421 is 12402321540031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8899183922500 + 4105328397921 = 2983150^2 + 2026161^2 .

It is a cyclic number.

It is not a de Polignac number, because 13004512320421 - 2³ = 13004512320413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13004512320421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13004512320461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6502256160210 + 6502256160211.

It is an arithmetic number, because the mean of its divisors is an integer number (6502256160211).

Almost surely, 2^{13004512320421} is an apocalyptic number.

It is an amenable number.

13004512320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13004512320421 is an equidigital number, since it uses as much as digits as its factorization.

13004512320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 13004512320421 its reverse (12402321540031), we get a palindrome (25406833860452).

The spelling of 13004512320421 in words is "thirteen trillion, four billion, five hundred twelve million, three hundred twenty thousand, four hundred twenty-one".