2101139 has 2 divisors, whose sum is σ = 2101140. Its totient is φ = 2101138.

The previous prime is 2101129. The next prime is 2101157. The reversal of 2101139 is 9311012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101139 - 2⁴ = 2101123 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2101129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050569 + 1050570.

It is an arithmetic number, because the mean of its divisors is an integer number (1050570).

2^2101139 is an apocalyptic number.

2101139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101139 is an equidigital number, since it uses as much as digits as its factorization.

2101139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 2101139 is about 1449.5306136815. The cubic root of 2101139 is about 128.0810643725.

The spelling of 2101139 in words is "two million, one hundred one thousand, one hundred thirty-nine".