111111118 has 4 divisors (see below), whose sum is σ = 166666680. Its totient is φ = 55555558.

The previous prime is 111111113. The next prime is 111111131. The reversal of 111111118 is 811111111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811111111 = 283 ⋅2866117.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777778 + ... + 27777781.

It is an arithmetic number, because the mean of its divisors is an integer number (41666670).

Almost surely, 2^111111118 is an apocalyptic number.

111111118 is a deficient number, since it is larger than the sum of its proper divisors (55555562).

111111118 is an equidigital number, since it uses as much as digits as its factorization.

111111118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55555561.

The product of its digits is 8, while the sum is 16.

The square root of 111111118 is about 10540.9258606633. The cubic root of 111111118 is about 480.7498667046.

Adding to 111111118 its reverse (811111111), we get a palindrome (922222229).

It can be divided in two parts, 11111111 and 8, that multiplied together give a palindrome (88888888).

The spelling of 111111118 in words is "one hundred eleven million, one hundred eleven thousand, one hundred eighteen".