13251252224421 has 16 divisors (see below), whose sum is σ = 19632252625920. Its totient is φ = 8833822617600.

The previous prime is 13251252224393. The next prime is 13251252224531. The reversal of 13251252224421 is 12442225215231.

13251252224421 is a `hidden beast` number, since 1 + 3 + 2 + 5 + 1 + 2 + 5 + 2 + 224 + 421 = 666.

It is not a de Polignac number, because 13251252224421 - 2⁵ = 13251252224389 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251252222421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8894085 + ... + 10276538.

It is an arithmetic number, because the mean of its divisors is an integer number (1227015789120).

Almost surely, 2^{13251252224421} is an apocalyptic number.

It is an amenable number.

13251252224421 is a deficient number, since it is larger than the sum of its proper divisors (6381000401499).

13251252224421 is a wasteful number, since it uses less digits than its factorization.

13251252224421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19196233 (or 19196227 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 13251252224421 its reverse (12442225215231), we get a palindrome (25693477439652).

The spelling of 13251252224421 in words is "thirteen trillion, two hundred fifty-one billion, two hundred fifty-two million, two hundred twenty-four thousand, four hundred twenty-one".