2100109 has 8 divisors (see below), whose sum is σ = 2324160. Its totient is φ = 1881600.

The previous prime is 2100097. The next prime is 2100113. The reversal of 2100109 is 9010012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100109 - 2¹³ = 2091917 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564 + ... + 2125.

It is an arithmetic number, because the mean of its divisors is an integer number (290520).

2^2100109 is an apocalyptic number.

It is an amenable number.

2100109 is a deficient number, since it is larger than the sum of its proper divisors (224051).

2100109 is a wasteful number, since it uses less digits than its factorization.

2100109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 2100109 is about 1449.1752827039. The cubic root of 2100109 is about 128.0601320656.

Subtracting 2100109 from its reverse (9010012), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 2100 and 109, that added together give a square (2209 = 47²).

The spelling of 2100109 in words is "two million, one hundred thousand, one hundred nine".