12171113118 has 12 divisors (see below), whose sum is σ = 26370745128. Its totient is φ = 4057037700.

The previous prime is 12171113089. The next prime is 12171113131. The reversal of 12171113118 is 81131117121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12171113091 and 12171113100.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 338086458 + ... + 338086493.

It is an arithmetic number, because the mean of its divisors is an integer number (2197562094).

Almost surely, 2^12171113118 is an apocalyptic number.

12171113118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12171113118 is an abundant number, since it is smaller than the sum of its proper divisors (14199632010).

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

12171113118 is a wasteful number, since it uses less digits than its factorization.

12171113118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676172959 (or 676172956 counting only the distinct ones).

The product of its digits is 336, while the sum is 27.

The spelling of 12171113118 in words is "twelve billion, one hundred seventy-one million, one hundred thirteen thousand, one hundred eighteen".