211001000209 has 2 divisors, whose sum is σ = 211001000210. Its totient is φ = 211001000208.

The previous prime is 211001000207. The next prime is 211001000239. The reversal of 211001000209 is 902000100112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199565905984 + 11435094225 = 446728^2 + 106935^2 .

It is a cyclic number.

It is not a de Polignac number, because 211001000209 - 2¹ = 211001000207 is a prime.

Together with 211001000207, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 211001000192 and 211001000201.

It is not a weakly prime, because it can be changed into another prime (211001000207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500500104 + 105500500105.

It is an arithmetic number, because the mean of its divisors is an integer number (105500500105).

Almost surely, 2^211001000209 is an apocalyptic number.

It is an amenable number.

211001000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

211001000209 is an equidigital number, since it uses as much as digits as its factorization.

211001000209 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 211001000209 in words is "two hundred eleven billion, one million, two hundred nine", and thus it is an aban number.