109911 has 4 divisors (see below), whose sum is σ = 146552. Its totient is φ = 73272.

The previous prime is 109903. The next prime is 109913. The reversal of 109911 is 119901.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 109911 - 2³ = 109903 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18316 + ... + 18321.

It is an arithmetic number, because the mean of its divisors is an integer number (36638).

2¹⁰⁹⁹¹¹ is an apocalyptic number.

109911 is a deficient number, since it is larger than the sum of its proper divisors (36641).

109911 is an equidigital number, since it uses as much as digits as its factorization.

109911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36640.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 109911 is about 331.5282793368. The cubic root of 109911 is about 47.9012727698.

It can be divided in two parts, 109 and 911, that multiplied together give a palindrome (99299).

The spelling of 109911 in words is "one hundred nine thousand, nine hundred eleven".