12232322221 has 16 divisors (see below), whose sum is σ = 14326416000. Its totient is φ = 10439780064.

The previous prime is 12232322213. The next prime is 12232322251. The reversal of 12232322221 is 12222323221.

It is not a de Polignac number, because 12232322221 - 2³ = 12232322213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12232322192 and 12232322201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12232322251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3390 + ... + 156448.

It is an arithmetic number, because the mean of its divisors is an integer number (895401000).

Almost surely, 2^12232322221 is an apocalyptic number.

It is an amenable number.

12232322221 is a deficient number, since it is larger than the sum of its proper divisors (2094093779).

12232322221 is an equidigital number, since it uses as much as digits as its factorization.

12232322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153313 (or 153299 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

Adding to 12232322221 its reverse (12222323221), we get a palindrome (24454645442).

The spelling of 12232322221 in words is "twelve billion, two hundred thirty-two million, three hundred twenty-two thousand, two hundred twenty-one".