1109091012 has 12 divisors (see below), whose sum is σ = 2587879056. Its totient is φ = 369697000.

The previous prime is 1109090989. The next prime is 1109091031. The reversal of 1109091012 is 2101909011.

It is a tau number, because it is divible by the number of its divisors (12).

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, 46212114 + ... + 46212137.

It is an arithmetic number, because the mean of its divisors is an integer number (215656588).

Almost surely, 2^1109091012 is an apocalyptic number.

1109091012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1109091012 is an abundant number, since it is smaller than the sum of its proper divisors (1478788044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1109091012 is a wasteful number, since it uses less digits than its factorization.

1109091012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92424258 (or 92424256 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 1109091012 is about 33303.0180614310. The cubic root of 1109091012 is about 1035.1160961044.

The spelling of 1109091012 in words is "one billion, one hundred nine million, ninety-one thousand, twelve".