12172322189 has 4 divisors (see below), whose sum is σ = 12172784640. Its totient is φ = 12171859740.

The previous prime is 12172322161. The next prime is 12172322191. The reversal of 12172322189 is 98122327121.

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 12172322189 - 2⁸ = 12172321933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12172322159) 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, 189197 + ... + 245234.

It is an arithmetic number, because the mean of its divisors is an integer number (3043196160).

Almost surely, 2^12172322189 is an apocalyptic number.

It is an amenable number.

12172322189 is a deficient number, since it is larger than the sum of its proper divisors (462451).

12172322189 is an equidigital number, since it uses as much as digits as its factorization.

12172322189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462450.

The product of its digits is 24192, while the sum is 38.

The spelling of 12172322189 in words is "twelve billion, one hundred seventy-two million, three hundred twenty-two thousand, one hundred eighty-nine".