12172727171 has 24 divisors (see below), whose sum is σ = 13477185792. Its totient is φ = 10986030000.

The previous prime is 12172727159. The next prime is 12172727179. The reversal of 12172727171 is 17172727121.

It is not a de Polignac number, because 12172727171 - 2¹⁰ = 12172726147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172727179) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14790266 + ... + 14791088.

It is an arithmetic number, because the mean of its divisors is an integer number (561549408).

Almost surely, 2^12172727171 is an apocalyptic number.

12172727171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12172727171 is a deficient number, since it is larger than the sum of its proper divisors (1304458621).

12172727171 is a wasteful number, since it uses less digits than its factorization.

12172727171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1572 counting only the distinct ones).

The product of its digits is 19208, while the sum is 38.

The spelling of 12172727171 in words is "twelve billion, one hundred seventy-two million, seven hundred twenty-seven thousand, one hundred seventy-one".