111117271 has 4 divisors (see below), whose sum is σ = 112217544. Its totient is φ = 110017000.

The previous prime is 111117269. The next prime is 111117277. The reversal of 111117271 is 172711111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172711111 = 101 ⋅1710011.

It is a cyclic number.

It is not a de Polignac number, because 111117271 - 2¹ = 111117269 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 (111117277) 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, 549985 + ... + 550186.

It is an arithmetic number, because the mean of its divisors is an integer number (28054386).

Almost surely, 2^111117271 is an apocalyptic number.

111117271 is a deficient number, since it is larger than the sum of its proper divisors (1100273).

111117271 is a wasteful number, since it uses less digits than its factorization.

111117271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100272.

The product of its digits is 98, while the sum is 22.

The square root of 111117271 is about 10541.2177190304. The cubic root of 111117271 is about 480.7587407021.

Adding to 111117271 its reverse (172711111), we get a palindrome (283828382).

The spelling of 111117271 in words is "one hundred eleven million, one hundred seventeen thousand, two hundred seventy-one".