11111022200021 has 2 divisors, whose sum is σ = 11111022200022. Its totient is φ = 11111022200020.

The previous prime is 11111022200011. The next prime is 11111022200041. The reversal of 11111022200021 is 12000222011111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6837545116900 + 4273477083121 = 2614870^2 + 2067239^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111022200021 - 2³⁰ = 11109948458197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111022199969 and 11111022200005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111022200011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555511100010 + 5555511100011.

It is an arithmetic number, because the mean of its divisors is an integer number (5555511100011).

Almost surely, 2^{11111022200021} is an apocalyptic number.

It is an amenable number.

11111022200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111022200021 is an equidigital number, since it uses as much as digits as its factorization.

11111022200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11111022200021 its reverse (12000222011111), we get a palindrome (23111244211132).

The spelling of 11111022200021 in words is "eleven trillion, one hundred eleven billion, twenty-two million, two hundred thousand, twenty-one".