13253134421 has 4 divisors (see below), whose sum is σ = 13576381644. Its totient is φ = 12929887200.

The previous prime is 13253134417. The next prime is 13253134441. The reversal of 13253134421 is 12443135231.

13253134421 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 an emirpimes, since its reverse is a distinct semiprime: 12443135231 = 197 ⋅63163123.

It can be written as a sum of positive squares in 2 ways, for example, as 720331921 + 12532802500 = 26839^2 + 111950^2 .

It is a cyclic number.

It is not a de Polignac number, because 13253134421 - 2² = 13253134417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13253134441) 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, 161623550 + ... + 161623631.

It is an arithmetic number, because the mean of its divisors is an integer number (3394095411).

Almost surely, 2^13253134421 is an apocalyptic number.

It is an amenable number.

13253134421 is a deficient number, since it is larger than the sum of its proper divisors (323247223).

13253134421 is an equidigital number, since it uses as much as digits as its factorization.

13253134421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323247222.

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

Adding to 13253134421 its reverse (12443135231), we get a palindrome (25696269652).

The spelling of 13253134421 in words is "thirteen billion, two hundred fifty-three million, one hundred thirty-four thousand, four hundred twenty-one".