100811109 has 16 divisors (see below), whose sum is σ = 154168832. Its totient is φ = 57399408.

The previous prime is 100811089. The next prime is 100811111. The reversal of 100811109 is 901118001.

It is not a de Polignac number, because 100811109 - 2⁹ = 100810597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100811119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2539 + ... + 14424.

It is an arithmetic number, because the mean of its divisors is an integer number (9635552).

Almost surely, 2^100811109 is an apocalyptic number.

It is an amenable number.

100811109 is a deficient number, since it is larger than the sum of its proper divisors (53357723).

100811109 is a wasteful number, since it uses less digits than its factorization.

100811109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17256.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 100811109 is about 10040.4735446093. The cubic root of 100811109 is about 465.4104504041.

The spelling of 100811109 in words is "one hundred million, eight hundred eleven thousand, one hundred nine".