12232823221 has 4 divisors (see below), whose sum is σ = 12237874272. Its totient is φ = 12227772172.

The previous prime is 12232823189. The next prime is 12232823227.

12232823221 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 12232823221 - 2⁵ = 12232823189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12232823221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232823227) 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, 2521891 + ... + 2526736.

It is an arithmetic number, because the mean of its divisors is an integer number (3059468568).

Almost surely, 2^12232823221 is an apocalyptic number.

It is an amenable number.

12232823221 is a deficient number, since it is larger than the sum of its proper divisors (5051051).

12232823221 is an equidigital number, since it uses as much as digits as its factorization.

12232823221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5051050.

The product of its digits is 4608, while the sum is 28.

The spelling of 12232823221 in words is "twelve billion, two hundred thirty-two million, eight hundred twenty-three thousand, two hundred twenty-one".