12152220171 has 64 divisors (see below), whose sum is σ = 20644528128. Its totient is φ = 6186958848.

The previous prime is 12152220161. The next prime is 12152220181. The reversal of 12152220171 is 17102225121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12152220161) and next prime (12152220181).

It is not a de Polignac number, because 12152220171 - 2⁶ = 12152220107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12152220121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1278091 + ... + 1287563.

It is an arithmetic number, because the mean of its divisors is an integer number (322570752).

Almost surely, 2^12152220171 is an apocalyptic number.

12152220171 is a deficient number, since it is larger than the sum of its proper divisors (8492307957).

12152220171 is a wasteful number, since it uses less digits than its factorization.

12152220171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9660.

The product of its (nonzero) digits is 560, while the sum is 24.

Adding to 12152220171 its reverse (17102225121), we get a palindrome (29254445292).

The spelling of 12152220171 in words is "twelve billion, one hundred fifty-two million, two hundred twenty thousand, one hundred seventy-one".