111112111 has 4 divisors (see below), whose sum is σ = 121213224. Its totient is φ = 101011000.

The previous prime is 111112087. The next prime is 111112121. The reversal of 111112111 is 111211111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111112111 - 2²¹ = 109014959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111112121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5050540 + ... + 5050561.

It is an arithmetic number, because the mean of its divisors is an integer number (30303306).

Almost surely, 2^111112111 is an apocalyptic number.

111112111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111112111 is a deficient number, since it is larger than the sum of its proper divisors (10101113).

111112111 is a wasteful number, since it uses less digits than its factorization.

111112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101112.

The product of its digits is 2, while the sum is 10.

The square root of 111112111 is about 10540.9729626823. The cubic root of 111112111 is about 480.7512988541.

Adding to 111112111 its reverse (111211111), we get a palindrome (222323222).

It can be divided in two parts, 11 and 1112111, that multiplied together give a palindrome (12233221).

The spelling of 111112111 in words is "one hundred eleven million, one hundred twelve thousand, one hundred eleven".