201211122110209 has 2 divisors, whose sum is σ = 201211122110210. Its totient is φ = 201211122110208.

The previous prime is 201211122110203. The next prime is 201211122110221. The reversal of 201211122110209 is 902011221112102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151287048014400 + 49924074095809 = 12299880^2 + 7065697^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211122110209 - 2¹³ = 201211122102017 is a prime.

It is a super-2 number, since 2×201211122110209² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201211122110203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605561055104 + 100605561055105.

It is an arithmetic number, because the mean of its divisors is an integer number (100605561055105).

Almost surely, 2^{201211122110209} is an apocalyptic number.

It is an amenable number.

201211122110209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211122110209 is an equidigital number, since it uses as much as digits as its factorization.

201211122110209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 201211122110209 in words is "two hundred one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, two hundred nine".