2101109 has 8 divisors (see below), whose sum is σ = 2172192. Its totient is φ = 2031120.

The previous prime is 2101093. The next prime is 2101111. The reversal of 2101109 is 9011012.

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 2101109 - 2⁴ = 2101093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101093 and 2101102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101129) 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, 5447 + ... + 5819.

It is an arithmetic number, because the mean of its divisors is an integer number (271524).

2^2101109 is an apocalyptic number.

It is an amenable number.

2101109 is a deficient number, since it is larger than the sum of its proper divisors (71083).

2101109 is a wasteful number, since it uses less digits than its factorization.

2101109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 2101109 is about 1449.5202654672. The cubic root of 2101109 is about 128.0804547904.

Subtracting 2101109 from its reverse (9011012), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2101109 in words is "two million, one hundred one thousand, one hundred nine".