13412423521521 has 8 divisors (see below), whose sum is σ = 19870257068960. Its totient is φ = 8941615680996.

The previous prime is 13412423521513. The next prime is 13412423521537. The reversal of 13412423521521 is 12512532421431.

13412423521521 is a `hidden beast` number, since 1 + 3 + 4 + 12 + 423 + 5 + 215 + 2 + 1 = 666.

It is not a de Polignac number, because 13412423521521 - 2³ = 13412423521513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13412423521121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248378213335 + ... + 248378213388.

It is an arithmetic number, because the mean of its divisors is an integer number (2483782133620).

Almost surely, 2^{13412423521521} is an apocalyptic number.

It is an amenable number.

13412423521521 is a deficient number, since it is larger than the sum of its proper divisors (6457833547439).

13412423521521 is an equidigital number, since it uses as much as digits as its factorization.

13412423521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496756426732 (or 496756426726 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 13412423521521 its reverse (12512532421431), we get a palindrome (25924955942952).

The spelling of 13412423521521 in words is "thirteen trillion, four hundred twelve billion, four hundred twenty-three million, five hundred twenty-one thousand, five hundred twenty-one".