2103811 has 2 divisors, whose sum is σ = 2103812. Its totient is φ = 2103810.

The previous prime is 2103797. The next prime is 2103817. The reversal of 2103811 is 1183012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2103811 - 2⁷ = 2103683 is a prime.

It is not a weakly prime, because it can be changed into another prime (2103817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051905 + 1051906.

It is an arithmetic number, because the mean of its divisors is an integer number (1051906).

2^2103811 is an apocalyptic number.

2103811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103811 is an equidigital number, since it uses as much as digits as its factorization.

2103811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2103811 is about 1450.4519985163. The cubic root of 2103811 is about 128.1353345620.

Adding to 2103811 its reverse (1183012), we get a palindrome (3286823).

The spelling of 2103811 in words is "two million, one hundred three thousand, eight hundred eleven".