11212112222209 has 2 divisors, whose sum is σ = 11212112222210. Its totient is φ = 11212112222208.

The previous prime is 11212112222203. The next prime is 11212112222239. The reversal of 11212112222209 is 90222221121211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8539632730225 + 2672479491984 = 2922265^2 + 1634772^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212112222209 - 2¹⁵ = 11212112189441 is a prime.

It is a super-2 number, since 2×11212112222209² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11212112222203) 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, 5606056111104 + 5606056111105.

It is an arithmetic number, because the mean of its divisors is an integer number (5606056111105).

Almost surely, 2^{11212112222209} is an apocalyptic number.

It is an amenable number.

11212112222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212112222209 is an equidigital number, since it uses as much as digits as its factorization.

11212112222209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 11212112222209 in words is "eleven trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-two thousand, two hundred nine".