10002221200021 has 2 divisors, whose sum is σ = 10002221200022. Its totient is φ = 10002221200020.

The previous prime is 10002221199977. The next prime is 10002221200043. The reversal of 10002221200021 is 12000212220001.

It is a happy number.

10002221200021 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., 9992464699396 + 9756500625 = 3161086^2 + 98775^2 .

It is a cyclic number.

It is not a de Polignac number, because 10002221200021 - 2³⁵ = 9967861461653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10002221199974 and 10002221200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10002221200921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001110600010 + 5001110600011.

It is an arithmetic number, because the mean of its divisors is an integer number (5001110600011).

Almost surely, 2^{10002221200021} is an apocalyptic number.

It is an amenable number.

10002221200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10002221200021 is an equidigital number, since it uses as much as digits as its factorization.

10002221200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 10002221200021 its reverse (12000212220001), we get a palindrome (22002433420022).

The spelling of 10002221200021 in words is "ten trillion, two billion, two hundred twenty-one million, two hundred thousand, twenty-one".