212210111209 has 2 divisors, whose sum is σ = 212210111210. Its totient is φ = 212210111208.

The previous prime is 212210111177. The next prime is 212210111219. The reversal of 212210111209 is 902111012212.

212210111209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210722312025 + 1487799184 = 459045^2 + 38572^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210111209 - 2⁵ = 212210111177 is a prime.

It is a super-2 number, since 2×212210111209² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212210111209.

It is not a weakly prime, because it can be changed into another prime (212210111219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105055604 + 106105055605.

It is an arithmetic number, because the mean of its divisors is an integer number (106105055605).

Almost surely, 2^212210111209 is an apocalyptic number.

It is an amenable number.

212210111209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210111209 is an equidigital number, since it uses as much as digits as its factorization.

212210111209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 212210111209 in words is "two hundred twelve billion, two hundred ten million, one hundred eleven thousand, two hundred nine".