11121100211209 has 2 divisors, whose sum is σ = 11121100211210. Its totient is φ = 11121100211208.

The previous prime is 11121100211201. The next prime is 11121100211227. The reversal of 11121100211209 is 90211200112111.

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., 10774970375625 + 346129835584 = 3282525^2 + 588328^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121100211209 - 2³ = 11121100211201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11121100211209.

It is not a weakly prime, because it can be changed into another prime (11121100211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560550105604 + 5560550105605.

It is an arithmetic number, because the mean of its divisors is an integer number (5560550105605).

Almost surely, 2^{11121100211209} is an apocalyptic number.

It is an amenable number.

11121100211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121100211209 is an equidigital number, since it uses as much as digits as its factorization.

11121100211209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 11121100211209 in words is "eleven trillion, one hundred twenty-one billion, one hundred million, two hundred eleven thousand, two hundred nine".