12157180171 has 16 divisors (see below), whose sum is σ = 12312878688. Its totient is φ = 12002918400.

The previous prime is 12157180163. The next prime is 12157180201. The reversal of 12157180171 is 17108175121.

It is a cyclic number.

It is not a de Polignac number, because 12157180171 - 2³ = 12157180163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12157180151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20500851 + ... + 20501443.

It is an arithmetic number, because the mean of its divisors is an integer number (769554918).

Almost surely, 2^12157180171 is an apocalyptic number.

12157180171 is a deficient number, since it is larger than the sum of its proper divisors (155698517).

12157180171 is a wasteful number, since it uses less digits than its factorization.

12157180171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 3920, while the sum is 34.

The spelling of 12157180171 in words is "twelve billion, one hundred fifty-seven million, one hundred eighty thousand, one hundred seventy-one".