11201220202021 has 2 divisors, whose sum is σ = 11201220202022. Its totient is φ = 11201220202020.

The previous prime is 11201220201979. The next prime is 11201220202043. The reversal of 11201220202021 is 12020202210211.

It is a happy number.

11201220202021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10515661041796 + 685559160225 = 3242786^2 + 827985^2 .

It is a cyclic number.

It is not a de Polignac number, because 11201220202021 - 2²⁵ = 11201186647589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11201220201986 and 11201220202004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11201220302021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5600610101010 + 5600610101011.

It is an arithmetic number, because the mean of its divisors is an integer number (5600610101011).

Almost surely, 2^{11201220202021} is an apocalyptic number.

It is an amenable number.

11201220202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11201220202021 is an equidigital number, since it uses as much as digits as its factorization.

11201220202021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11201220202021 its reverse (12020202210211), we get a palindrome (23221422412232).

The spelling of 11201220202021 in words is "eleven trillion, two hundred one billion, two hundred twenty million, two hundred two thousand, twenty-one".