111812 has 6 divisors (see below), whose sum is σ = 195678. Its totient is φ = 55904.

The previous prime is 111799. The next prime is 111821. The reversal of 111812 is 218111.

It can be written as a sum of positive squares in only one way, i.e., 111556 + 256 = 334^2 + 16^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13973 + ... + 13980.

It is an arithmetic number, because the mean of its divisors is an integer number (32613).

2¹¹¹⁸¹² is an apocalyptic number.

It is an amenable number.

111812 is a deficient number, since it is larger than the sum of its proper divisors (83866).

111812 is a wasteful number, since it uses less digits than its factorization.

111812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27957 (or 27955 counting only the distinct ones).

The product of its digits is 16, while the sum is 14.

The square root of 111812 is about 334.3830139227. The cubic root of 111812 is about 48.1758595391.

Adding to 111812 its reverse (218111), we get a palindrome (329923).

The spelling of 111812 in words is "one hundred eleven thousand, eight hundred twelve".