109111111 has 8 divisors (see below), whose sum is σ = 111605760. Its totient is φ = 106623768.

The previous prime is 109111109. The next prime is 109111141. The reversal of 109111111 is 111111901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109111111 - 2¹ = 109111109 is a prime.

It is a Duffinian number.

109111111 is a modest number, since divided by 11111 gives 1091 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109111141) 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 7 ways as a sum of consecutive naturals, for example, 38050 + ... + 40816.

It is an arithmetic number, because the mean of its divisors is an integer number (13950720).

Almost surely, 2^109111111 is an apocalyptic number.

109111111 is a deficient number, since it is larger than the sum of its proper divisors (2494649).

109111111 is an equidigital number, since it uses as much as digits as its factorization.

109111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3653.

The product of its (nonzero) digits is 9, while the sum is 16.

The square root of 109111111 is about 10445.6264053431. The cubic root of 109111111 is about 477.8478752969.

It can be divided in two parts, 10911 and 1111, that multiplied together give a palindrome (12122121).

The spelling of 109111111 in words is "one hundred nine million, one hundred eleven thousand, one hundred eleven".