22202002100221 has 2 divisors, whose sum is σ = 22202002100222. Its totient is φ = 22202002100220.

The previous prime is 22202002100189. The next prime is 22202002100261. The reversal of 22202002100221 is 12200120020222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21469461255225 + 732540844996 = 4633515^2 + 855886^2 .

It is a cyclic number.

It is not a de Polignac number, because 22202002100221 - 2⁵ = 22202002100189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22202002100195 and 22202002100204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22202002100261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11101001050110 + 11101001050111.

It is an arithmetic number, because the mean of its divisors is an integer number (11101001050111).

Almost surely, 2^{22202002100221} is an apocalyptic number.

It is an amenable number.

22202002100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22202002100221 is an equidigital number, since it uses as much as digits as its factorization.

22202002100221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22202002100221 its reverse (12200120020222), we get a palindrome (34402122120443).

The spelling of 22202002100221 in words is "twenty-two trillion, two hundred two billion, two million, one hundred thousand, two hundred twenty-one".