111711117 has 32 divisors (see below), whose sum is σ = 173521152. Its totient is φ = 62613504.

The previous prime is 111711079. The next prime is 111711133. The reversal of 111711117 is 711117111.

It is not a de Polignac number, because 111711117 - 2¹⁸ = 111448973 is a prime.

It is a super-2 number, since 2×111711117² = 24958747322775378, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 111711093 and 111711102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111713117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 352243 + ... + 352559.

It is an arithmetic number, because the mean of its divisors is an integer number (5422536).

Almost surely, 2^111711117 is an apocalyptic number.

It is an amenable number.

111711117 is a deficient number, since it is larger than the sum of its proper divisors (61810035).

111711117 is a wasteful number, since it uses less digits than its factorization.

111711117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597.

The product of its digits is 49, while the sum is 21.

The square root of 111711117 is about 10569.3479931356. The cubic root of 111711117 is about 481.6136620007.

Adding to 111711117 its reverse (711117111), we get a palindrome (822828228).

It can be divided in two parts, 111 and 711117, that multiplied together give a palindrome (78933987).

The spelling of 111711117 in words is "one hundred eleven million, seven hundred eleven thousand, one hundred seventeen".