13204232521 has 2 divisors, whose sum is σ = 13204232522. Its totient is φ = 13204232520.

The previous prime is 13204232519. The next prime is 13204232543. The reversal of 13204232521 is 12523240231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11810255625 + 1393976896 = 108675^2 + 37336^2 .

It is a cyclic number.

It is not a de Polignac number, because 13204232521 - 2¹ = 13204232519 is a prime.

Together with 13204232519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13204232501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6602116260 + 6602116261.

It is an arithmetic number, because the mean of its divisors is an integer number (6602116261).

Almost surely, 2^13204232521 is an apocalyptic number.

It is an amenable number.

13204232521 is a deficient number, since it is larger than the sum of its proper divisors (1).

13204232521 is an equidigital number, since it uses as much as digits as its factorization.

13204232521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 13204232521 its reverse (12523240231), we get a palindrome (25727472752).

The spelling of 13204232521 in words is "thirteen billion, two hundred four million, two hundred thirty-two thousand, five hundred twenty-one".