12111086172 has 48 divisors (see below), whose sum is σ = 31039868160. Its totient is φ = 3658267008.

The previous prime is 12111086167. The next prime is 12111086177. The reversal of 12111086172 is 27168011121.

It is an interprime number because it is at equal distance from previous prime (12111086167) and next prime (12111086177).

It is a super-2 number, since 2×12111086172² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111086177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1149513 + ... + 1160000.

It is an arithmetic number, because the mean of its divisors is an integer number (646663920).

Almost surely, 2^12111086172 is an apocalyptic number.

12111086172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12111086172 is an abundant number, since it is smaller than the sum of its proper divisors (18928781988).

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

12111086172 is a wasteful number, since it uses less digits than its factorization.

12111086172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309562 (or 2309560 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 30.

Adding to 12111086172 its reverse (27168011121), we get a palindrome (39279097293).

The spelling of 12111086172 in words is "twelve billion, one hundred eleven million, eighty-six thousand, one hundred seventy-two".