211430129 has 2 divisors, whose sum is σ = 211430130. Its totient is φ = 211430128.

The previous prime is 211430069. The next prime is 211430143. The reversal of 211430129 is 921034112.

211430129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 68029504 = 11975^2 + 8248^2 .

It is a cyclic number.

It is not a de Polignac number, because 211430129 - 2⁸ = 211429873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (211430159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105715064 + 105715065.

It is an arithmetic number, because the mean of its divisors is an integer number (105715065).

Almost surely, 2^211430129 is an apocalyptic number.

It is an amenable number.

211430129 is a deficient number, since it is larger than the sum of its proper divisors (1).

211430129 is an equidigital number, since it uses as much as digits as its factorization.

211430129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 211430129 is about 14540.6371593545. The cubic root of 211430129 is about 595.7384414888.

The spelling of 211430129 in words is "two hundred eleven million, four hundred thirty thousand, one hundred twenty-nine".