111242111 has 4 divisors (see below), whose sum is σ = 111268872. Its totient is φ = 111215352.

The previous prime is 111242083. The next prime is 111242119.

111242111 is nontrivially palindromic in base 10.

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 111242111 - 2²² = 107047807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111242119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5660 + ... + 15953.

It is an arithmetic number, because the mean of its divisors is an integer number (27817218).

Almost surely, 2^111242111 is an apocalyptic number.

111242111 is a deficient number, since it is larger than the sum of its proper divisors (26761).

111242111 is an equidigital number, since it uses as much as digits as its factorization.

111242111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26760.

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

The square root of 111242111 is about 10547.1375737685. The cubic root of 111242111 is about 480.9387171000.

The spelling of 111242111 in words is "one hundred eleven million, two hundred forty-two thousand, one hundred eleven".