11122211209 has 2 divisors, whose sum is σ = 11122211210. Its totient is φ = 11122211208.

The previous prime is 11122211201. The next prime is 11122211227. The reversal of 11122211209 is 90211222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6391522809 + 4730688400 = 79947^2 + 68780^2 .

It is an emirp because it is prime and its reverse (90211222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11122211209 - 2³ = 11122211201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11122211209.

It is not a weakly prime, because it can be changed into another prime (11122211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561105604 + 5561105605.

It is an arithmetic number, because the mean of its divisors is an integer number (5561105605).

Almost surely, 2^11122211209 is an apocalyptic number.

It is an amenable number.

11122211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122211209 is an equidigital number, since it uses as much as digits as its factorization.

11122211209 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 22.

The spelling of 11122211209 in words is "eleven billion, one hundred twenty-two million, two hundred eleven thousand, two hundred nine".