211210210222009 has 2 divisors, whose sum is σ = 211210210222010. Its totient is φ = 211210210222008.

The previous prime is 211210210222007. The next prime is 211210210222087. The reversal of 211210210222009 is 900222012012112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205986448563984 + 5223761658025 = 14352228^2 + 2285555^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210210222009 - 2¹ = 211210210222007 is a prime.

It is a super-3 number, since 3×211210210222009³ (a number of 44 digits) contains 333 as substring.

Together with 211210210222007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (211210210222007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605105111004 + 105605105111005.

It is an arithmetic number, because the mean of its divisors is an integer number (105605105111005).

Almost surely, 2^{211210210222009} is an apocalyptic number.

It is an amenable number.

211210210222009 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210210222009 is an equidigital number, since it uses as much as digits as its factorization.

211210210222009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 211210210222009 in words is "two hundred eleven trillion, two hundred ten billion, two hundred ten million, two hundred twenty-two thousand, nine".