109121105 has 4 divisors (see below), whose sum is σ = 130945332. Its totient is φ = 87296880.

The previous prime is 109121093. The next prime is 109121119. The reversal of 109121105 is 501121901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25928464 + 83192641 = 5092^2 + 9121^2 .

It is a de Polignac number, because none of the positive numbers 2^k-109121105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10912106 + ... + 10912115.

It is an arithmetic number, because the mean of its divisors is an integer number (32736333).

Almost surely, 2^109121105 is an apocalyptic number.

It is an amenable number.

109121105 is a deficient number, since it is larger than the sum of its proper divisors (21824227).

109121105 is an equidigital number, since it uses as much as digits as its factorization.

109121105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21824226.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 109121105 is about 10446.1047764226. The cubic root of 109121105 is about 477.8624642965.

The spelling of 109121105 in words is "one hundred nine million, one hundred twenty-one thousand, one hundred five".