12171158232 has 16 divisors (see below), whose sum is σ = 30427895640. Its totient is φ = 4057052736.

The previous prime is 12171158231. The next prime is 12171158249. The reversal of 12171158232 is 23285117121.

12171158232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12171158193 and 12171158202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12171158231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253565773 + ... + 253565820.

Almost surely, 2^12171158232 is an apocalyptic number.

12171158232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12171158232 is an abundant number, since it is smaller than the sum of its proper divisors (18256737408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12171158232 is a wasteful number, since it uses less digits than its factorization.

12171158232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507131602 (or 507131598 counting only the distinct ones).

The product of its digits is 6720, while the sum is 33.

The spelling of 12171158232 in words is "twelve billion, one hundred seventy-one million, one hundred fifty-eight thousand, two hundred thirty-two".