12323221121 has 4 divisors (see below), whose sum is σ = 12323454000. Its totient is φ = 12322988244.

The previous prime is 12323221109. The next prime is 12323221181. The reversal of 12323221121 is 12112232321.

12323221121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-12323221121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12323221093 and 12323221102.

It is not an unprimeable number, because it can be changed into a prime (12323221181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5510 + ... + 157088.

It is an arithmetic number, because the mean of its divisors is an integer number (3080863500).

Almost surely, 2^12323221121 is an apocalyptic number.

It is an amenable number.

12323221121 is a deficient number, since it is larger than the sum of its proper divisors (232879).

12323221121 is an equidigital number, since it uses as much as digits as its factorization.

12323221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232878.

The product of its digits is 288, while the sum is 20.

Adding to 12323221121 its reverse (12112232321), we get a palindrome (24435453442).

The spelling of 12323221121 in words is "twelve billion, three hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".