109123111 has 4 divisors (see below), whose sum is σ = 109193800. Its totient is φ = 109052424.

The previous prime is 109123073. The next prime is 109123117. The reversal of 109123111 is 111321901.

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

It is a cyclic number.

It is not a de Polignac number, because 109123111 - 2⁹ = 109122599 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 (109123117) 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, 32976 + ... + 36133.

It is an arithmetic number, because the mean of its divisors is an integer number (27298450).

Almost surely, 2^109123111 is an apocalyptic number.

109123111 is a deficient number, since it is larger than the sum of its proper divisors (70689).

109123111 is an equidigital number, since it uses as much as digits as its factorization.

109123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70688.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 109123111 is about 10446.2007926327. The cubic root of 109123111 is about 477.8653924995.

The spelling of 109123111 in words is "one hundred nine million, one hundred twenty-three thousand, one hundred eleven".