12504323021 has 8 divisors (see below), whose sum is σ = 13286660544. Its totient is φ = 11727184320.

The previous prime is 12504323017. The next prime is 12504323071. The reversal of 12504323021 is 12032340521.

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 12504323021 - 2² = 12504323017 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 (12504323071) 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, 1294745 + ... + 1304366.

It is an arithmetic number, because the mean of its divisors is an integer number (1660832568).

Almost surely, 2^12504323021 is an apocalyptic number.

It is an amenable number.

12504323021 is a deficient number, since it is larger than the sum of its proper divisors (782337523).

12504323021 is a wasteful number, since it uses less digits than its factorization.

12504323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599411.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 12504323021 its reverse (12032340521), we get a palindrome (24536663542).

The spelling of 12504323021 in words is "twelve billion, five hundred four million, three hundred twenty-three thousand, twenty-one".