13431024421 has 4 divisors (see below), whose sum is σ = 13431258432. Its totient is φ = 13430790412.

The previous prime is 13431024413. The next prime is 13431024461. The reversal of 13431024421 is 12442013431.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13431024421 - 2³ = 13431024413 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 (13431024461) 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, 34356 + ... + 167458.

It is an arithmetic number, because the mean of its divisors is an integer number (3357814608).

Almost surely, 2^13431024421 is an apocalyptic number.

It is an amenable number.

13431024421 is a deficient number, since it is larger than the sum of its proper divisors (234011).

13431024421 is a wasteful number, since it uses less digits than its factorization.

13431024421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234010.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 13431024421 its reverse (12442013431), we get a palindrome (25873037852).

The spelling of 13431024421 in words is "thirteen billion, four hundred thirty-one million, twenty-four thousand, four hundred twenty-one".