13424133421 has 4 divisors (see below), whose sum is σ = 13644201244. Its totient is φ = 13204065600.

The previous prime is 13424133397. The next prime is 13424133427. The reversal of 13424133421 is 12433142431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12433142431 = 503 ⋅24717977.

It can be written as a sum of positive squares in 2 ways, for example, as 5010657796 + 8413475625 = 70786^2 + 91725^2 .

It is a cyclic number.

It is not a de Polignac number, because 13424133421 - 2¹⁵ = 13424100653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13424133421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13424133427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110033820 + ... + 110033941.

It is an arithmetic number, because the mean of its divisors is an integer number (3411050311).

Almost surely, 2^13424133421 is an apocalyptic number.

It is an amenable number.

13424133421 is a deficient number, since it is larger than the sum of its proper divisors (220067823).

13424133421 is an equidigital number, since it uses as much as digits as its factorization.

13424133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220067822.

The product of its digits is 6912, while the sum is 28.

Adding to 13424133421 its reverse (12433142431), we get a palindrome (25857275852).

The spelling of 13424133421 in words is "thirteen billion, four hundred twenty-four million, one hundred thirty-three thousand, four hundred twenty-one".