111312180 has 216 divisors, whose sum is σ = 405804672. Its totient is φ = 24190848.

The previous prime is 111312161. The next prime is 111312191. The reversal of 111312180 is 81213111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 666457 + ... + 666623.

Almost surely, 2^111312180 is an apocalyptic number.

111312180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111312180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202902336).

111312180 is an abundant number, since it is smaller than the sum of its proper divisors (294492492).

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

111312180 is a wasteful number, since it uses less digits than its factorization.

111312180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 111312180 is about 10550.4587577982. The cubic root of 111312180 is about 481.0396735386.

Adding to 111312180 its reverse (81213111), we get a palindrome (192525291).

The spelling of 111312180 in words is "one hundred eleven million, three hundred twelve thousand, one hundred eighty".