211210210129 has 2 divisors, whose sum is σ = 211210210130. Its totient is φ = 211210210128.

The previous prime is 211210210111. The next prime is 211210210219. The reversal of 211210210129 is 921012012112.

Together with next prime (211210210219) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117390520129 + 93819690000 = 342623^2 + 306300^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210210129 - 2¹¹ = 211210208081 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210210529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605105064 + 105605105065.

It is an arithmetic number, because the mean of its divisors is an integer number (105605105065).

Almost surely, 2^211210210129 is an apocalyptic number.

It is an amenable number.

211210210129 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210210129 is an equidigital number, since it uses as much as digits as its factorization.

211210210129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 211210210129 in words is "two hundred eleven billion, two hundred ten million, two hundred ten thousand, one hundred twenty-nine".