111089 has 4 divisors (see below), whose sum is σ = 121200. Its totient is φ = 100980.

The previous prime is 111053. The next prime is 111091. The reversal of 111089 is 980111.

111089 = T₆₅ + T₆₆ + ... + T₉₇.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980111 = 11 ⋅89101.

It is not a de Polignac number, because 111089 - 2¹² = 106993 is a prime.

It is a Duffinian number.

111089 is a modest number, since divided by 1089 gives 11 as remainder.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 111089.

It is not an unprimeable number, because it can be changed into a prime (111029) 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, 5039 + ... + 5060.

It is an arithmetic number, because the mean of its divisors is an integer number (30300).

2¹¹¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

111089 is a deficient number, since it is larger than the sum of its proper divisors (10111).

111089 is a wasteful number, since it uses less digits than its factorization.

111089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10110.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 111089 is about 333.3001650165. The cubic root of 111089 is about 48.0717964913.

It can be divided in two parts, 1110 and 89, that multiplied together give a triangular number (98790 = T₄₄₄).

The spelling of 111089 in words is "one hundred eleven thousand, eighty-nine".