11201220220121 has 2 divisors, whose sum is σ = 11201220220122. Its totient is φ = 11201220220120.

The previous prime is 11201220220097. The next prime is 11201220220159. The reversal of 11201220220121 is 12102202210211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6780482692096 + 4420737528025 = 2603936^2 + 2102555^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201220220121 - 2²² = 11201216025817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11201220220121.

It is not a weakly prime, because it can be changed into another prime (11201220220181) 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, 5600610110060 + 5600610110061.

It is an arithmetic number, because the mean of its divisors is an integer number (5600610110061).

Almost surely, 2^{11201220220121} is an apocalyptic number.

It is an amenable number.

11201220220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201220220121 is an equidigital number, since it uses as much as digits as its factorization.

11201220220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11201220220121 its reverse (12102202210211), we get a palindrome (23303422430332).

The spelling of 11201220220121 in words is "eleven trillion, two hundred one billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".