2101129 has 2 divisors, whose sum is σ = 2101130. Its totient is φ = 2101128.

The previous prime is 2101123. The next prime is 2101139. The reversal of 2101129 is 9211012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1317904 + 783225 = 1148^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101129 - 2¹¹ = 2099081 is a prime.

2101129 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2101123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050564 + 1050565.

It is an arithmetic number, because the mean of its divisors is an integer number (1050565).

2^2101129 is an apocalyptic number.

It is an amenable number.

2101129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101129 is an equidigital number, since it uses as much as digits as its factorization.

2101129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 2101129 is about 1449.5271642850. The cubic root of 2101129 is about 128.0808611791.

The spelling of 2101129 in words is "two million, one hundred one thousand, one hundred twenty-nine".