211210110120209 has 2 divisors, whose sum is σ = 211210110120210. Its totient is φ = 211210110120208.

The previous prime is 211210110120077. The next prime is 211210110120241. The reversal of 211210110120209 is 902021011012112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195539754503809 + 15670355616400 = 13983553^2 + 3958580^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210110120209 - 2²⁴ = 211210093342993 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210110120409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605055060104 + 105605055060105.

It is an arithmetic number, because the mean of its divisors is an integer number (105605055060105).

Almost surely, 2^{211210110120209} is an apocalyptic number.

It is an amenable number.

211210110120209 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210110120209 is an equidigital number, since it uses as much as digits as its factorization.

211210110120209 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 23.

The spelling of 211210110120209 in words is "two hundred eleven trillion, two hundred ten billion, one hundred ten million, one hundred twenty thousand, two hundred nine".