13204809244421 has 2 divisors, whose sum is σ = 13204809244422. Its totient is φ = 13204809244420.

The previous prime is 13204809244409. The next prime is 13204809244511. The reversal of 13204809244421 is 12444290840231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12838283133025 + 366526111396 = 3583055^2 + 605414^2 .

It is an emirp because it is prime and its reverse (12444290840231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13204809244421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13204809240421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6602404622210 + 6602404622211.

It is an arithmetic number, because the mean of its divisors is an integer number (6602404622211).

Almost surely, 2^{13204809244421} is an apocalyptic number.

It is an amenable number.

13204809244421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13204809244421 is an equidigital number, since it uses as much as digits as its factorization.

13204809244421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 13204809244421 in words is "thirteen trillion, two hundred four billion, eight hundred nine million, two hundred forty-four thousand, four hundred twenty-one".