22100200100021 has 2 divisors, whose sum is σ = 22100200100022. Its totient is φ = 22100200100020.

The previous prime is 22100200100009. The next prime is 22100200100063. The reversal of 22100200100021 is 12000100200122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19964185696900 + 2136014403121 = 4468130^2 + 1461511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22100200100021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100200099975 and 22100200100011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100200100621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050100050010 + 11050100050011.

It is an arithmetic number, because the mean of its divisors is an integer number (11050100050011).

Almost surely, 2^{22100200100021} is an apocalyptic number.

It is an amenable number.

22100200100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100200100021 is an equidigital number, since it uses as much as digits as its factorization.

22100200100021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22100200100021 its reverse (12000100200122), we get a palindrome (34100300300143).

The spelling of 22100200100021 in words is "twenty-two trillion, one hundred billion, two hundred million, one hundred thousand, twenty-one".