12161112 has 32 divisors (see below), whose sum is σ = 31726080. Its totient is φ = 3877280.

The previous prime is 12161099. The next prime is 12161113. The reversal of 12161112 is 21116121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12161091 and 12161100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10464 + ... + 11567.

It is an arithmetic number, because the mean of its divisors is an integer number (991440).

Almost surely, 2^12161112 is an apocalyptic number.

12161112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12161112 is an abundant number, since it is smaller than the sum of its proper divisors (19564968).

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

12161112 is a wasteful number, since it uses less digits than its factorization.

12161112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22063 (or 22059 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 12161112 is about 3487.2785951226. The cubic root of 12161112 is about 229.9628925643.

Adding to 12161112 its reverse (21116121), we get a palindrome (33277233).

The spelling of 12161112 in words is "twelve million, one hundred sixty-one thousand, one hundred twelve".