12524043221 has 16 divisors (see below), whose sum is σ = 12929716800. Its totient is φ = 12125745408.

The previous prime is 12524043197. The next prime is 12524043241. The reversal of 12524043221 is 12234042521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12524043221 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 (12524043241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1646495 + ... + 1654083.

It is an arithmetic number, because the mean of its divisors is an integer number (808107300).

Almost surely, 2^12524043221 is an apocalyptic number.

It is an amenable number.

12524043221 is a deficient number, since it is larger than the sum of its proper divisors (405673579).

12524043221 is an equidigital number, since it uses as much as digits as its factorization.

12524043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8068.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12524043221 its reverse (12234042521), we get a palindrome (24758085742).

The spelling of 12524043221 in words is "twelve billion, five hundred twenty-four million, forty-three thousand, two hundred twenty-one".