118117111 has 4 divisors (see below), whose sum is σ = 134990992. Its totient is φ = 101243232.

The previous prime is 118117049. The next prime is 118117147. The reversal of 118117111 is 111711811.

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 118117111 - 2¹⁷ = 117986039 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 (118117211) 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, 8436930 + ... + 8436943.

It is an arithmetic number, because the mean of its divisors is an integer number (33747748).

Almost surely, 2^118117111 is an apocalyptic number.

118117111 is a deficient number, since it is larger than the sum of its proper divisors (16873881).

118117111 is an equidigital number, since it uses as much as digits as its factorization.

118117111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16873880.

The product of its digits is 56, while the sum is 22.

The square root of 118117111 is about 10868.1696251025. The cubic root of 118117111 is about 490.6490233467.

Adding to 118117111 its reverse (111711811), we get a palindrome (229828922).

The spelling of 118117111 in words is "one hundred eighteen million, one hundred seventeen thousand, one hundred eleven".