11212002211121 has 2 divisors, whose sum is σ = 11212002211122. Its totient is φ = 11212002211120.

The previous prime is 11212002211043. The next prime is 11212002211159. The reversal of 11212002211121 is 12111220021211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8817864921121 + 2394137290000 = 2969489^2 + 1547300^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212002211121 - 2³⁰ = 11210928469297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11212002211121.

It is not a weakly prime, because it can be changed into another prime (11212002211181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606001105560 + 5606001105561.

It is an arithmetic number, because the mean of its divisors is an integer number (5606001105561).

Almost surely, 2^{11212002211121} is an apocalyptic number.

It is an amenable number.

11212002211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212002211121 is an equidigital number, since it uses as much as digits as its factorization.

11212002211121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11212002211121 its reverse (12111220021211), we get a palindrome (23323222232332).

The spelling of 11212002211121 in words is "eleven trillion, two hundred twelve billion, two million, two hundred eleven thousand, one hundred twenty-one".