12204732321 has 8 divisors (see below), whose sum is σ = 18081084960. Its totient is φ = 8136488196.

The previous prime is 12204732317. The next prime is 12204732329. The reversal of 12204732321 is 12323740221.

It is not a de Polignac number, because 12204732321 - 2² = 12204732317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 452027123 = 12204732321 / (1 + 2 + 2 + 0 + 4 + 7 + 3 + 2 + 3 + 2 + 1).

It is not an unprimeable number, because it can be changed into a prime (12204732329) 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, 226013535 + ... + 226013588.

It is an arithmetic number, because the mean of its divisors is an integer number (2260135620).

Almost surely, 2^12204732321 is an apocalyptic number.

It is an amenable number.

12204732321 is a deficient number, since it is larger than the sum of its proper divisors (5876352639).

12204732321 is an equidigital number, since it uses as much as digits as its factorization.

12204732321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452027132 (or 452027126 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 12204732321 in words is "twelve billion, two hundred four million, seven hundred thirty-two thousand, three hundred twenty-one".