12404344521 has 8 divisors (see below), whose sum is σ = 17258218560. Its totient is φ = 7910016752.

The previous prime is 12404344507. The next prime is 12404344523. The reversal of 12404344521 is 12544340421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12404344521 - 2⁵ = 12404344489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12404344523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89886486 + ... + 89886623.

It is an arithmetic number, because the mean of its divisors is an integer number (2157277320).

Almost surely, 2^12404344521 is an apocalyptic number.

It is an amenable number.

12404344521 is a deficient number, since it is larger than the sum of its proper divisors (4853874039).

12404344521 is a wasteful number, since it uses less digits than its factorization.

12404344521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179773135.

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 12404344521 its reverse (12544340421), we get a palindrome (24948684942).

The spelling of 12404344521 in words is "twelve billion, four hundred four million, three hundred forty-four thousand, five hundred twenty-one".