111111010109 has 32 divisors (see below), whose sum is σ = 130982116608. Its totient is φ = 93240576000.

The previous prime is 111111010103. The next prime is 111111010121. The reversal of 111111010109 is 901010111111.

It is not a de Polignac number, because 111111010109 - 2⁴ = 111111010093 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 (111111010103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 750029 + ... + 885869.

It is an arithmetic number, because the mean of its divisors is an integer number (4093191144).

Almost surely, 2^111111010109 is an apocalyptic number.

It is an amenable number.

111111010109 is a deficient number, since it is larger than the sum of its proper divisors (19871106499).

111111010109 is a wasteful number, since it uses less digits than its factorization.

111111010109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135989.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 111111010109 in words is "one hundred eleven billion, one hundred eleven million, ten thousand, one hundred nine".