211210000011209 has 2 divisors, whose sum is σ = 211210000011210. Its totient is φ = 211210000011208.

The previous prime is 211210000011193. The next prime is 211210000011217. The reversal of 211210000011209 is 902110000012112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202187696209984 + 9022303801225 = 14219272^2 + 3003715^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210000011209 - 2⁴ = 211210000011193 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210000011229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605000005604 + 105605000005605.

It is an arithmetic number, because the mean of its divisors is an integer number (105605000005605).

Almost surely, 2^{211210000011209} is an apocalyptic number.

It is an amenable number.

211210000011209 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210000011209 is an equidigital number, since it uses as much as digits as its factorization.

211210000011209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 211210000011209 in words is "two hundred eleven trillion, two hundred ten billion, eleven thousand, two hundred nine".