12195158217 has 8 divisors (see below), whose sum is σ = 17738412000. Its totient is φ = 7391004960.

The previous prime is 12195158179. The next prime is 12195158221. The reversal of 12195158217 is 71285159121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12195158217 - 2¹⁸ = 12194896073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12195158237) 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, 184775092 + ... + 184775157.

It is an arithmetic number, because the mean of its divisors is an integer number (2217301500).

Almost surely, 2^12195158217 is an apocalyptic number.

It is an amenable number.

12195158217 is a deficient number, since it is larger than the sum of its proper divisors (5543253783).

12195158217 is a wasteful number, since it uses less digits than its factorization.

12195158217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369550263.

The product of its digits is 50400, while the sum is 42.

The spelling of 12195158217 in words is "twelve billion, one hundred ninety-five million, one hundred fifty-eight thousand, two hundred seventeen".