13124533421 has 4 divisors (see below), whose sum is σ = 13346983200. Its totient is φ = 12902083644.

The previous prime is 13124533397. The next prime is 13124533439. The reversal of 13124533421 is 12433542131.

13124533421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13124533421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13124533021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111224801 + ... + 111224918.

It is an arithmetic number, because the mean of its divisors is an integer number (3336745800).

Almost surely, 2^13124533421 is an apocalyptic number.

It is an amenable number.

13124533421 is a deficient number, since it is larger than the sum of its proper divisors (222449779).

13124533421 is an equidigital number, since it uses as much as digits as its factorization.

13124533421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222449778.

The product of its digits is 8640, while the sum is 29.

The spelling of 13124533421 in words is "thirteen billion, one hundred twenty-four million, five hundred thirty-three thousand, four hundred twenty-one".