13243011421 has 4 divisors (see below), whose sum is σ = 13248381952. Its totient is φ = 13237640892.

The previous prime is 13243011403. The next prime is 13243011437. The reversal of 13243011421 is 12411034231.

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 not a de Polignac number, because 13243011421 - 2⁷ = 13243011293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13243011392 and 13243011401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243011721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681565 + ... + 2686498.

It is an arithmetic number, because the mean of its divisors is an integer number (3312095488).

Almost surely, 2^13243011421 is an apocalyptic number.

It is an amenable number.

13243011421 is a deficient number, since it is larger than the sum of its proper divisors (5370531).

13243011421 is an equidigital number, since it uses as much as digits as its factorization.

13243011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370530.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 13243011421 its reverse (12411034231), we get a palindrome (25654045652).

The spelling of 13243011421 in words is "thirteen billion, two hundred forty-three million, eleven thousand, four hundred twenty-one".