2101105 has 4 divisors (see below), whose sum is σ = 2521332. Its totient is φ = 1680880.

The previous prime is 2101093. The next prime is 2101111. The reversal of 2101105 is 5011012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 400689 + 1700416 = 633^2 + 1304^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2101105 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101091 and 2101100.

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, 210106 + ... + 210115.

It is an arithmetic number, because the mean of its divisors is an integer number (630333).

2^2101105 is an apocalyptic number.

It is an amenable number.

2101105 is a deficient number, since it is larger than the sum of its proper divisors (420227).

2101105 is an equidigital number, since it uses as much as digits as its factorization.

2101105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420226.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 2101105 is about 1449.5188856997. The cubic root of 2101105 is about 128.0803735123.

Adding to 2101105 its reverse (5011012), we get a palindrome (7112117).

The spelling of 2101105 in words is "two million, one hundred one thousand, one hundred five".