22221010200121 has 2 divisors, whose sum is σ = 22221010200122. Its totient is φ = 22221010200120.

The previous prime is 22221010200089. The next prime is 22221010200127. The reversal of 22221010200121 is 12100201012222.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21685888689721 + 535121510400 = 4656811^2 + 731520^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221010200121 - 2⁵ = 22221010200089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221010200095 and 22221010200104.

It is not a weakly prime, because it can be changed into another prime (22221010200127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110505100060 + 11110505100061.

It is an arithmetic number, because the mean of its divisors is an integer number (11110505100061).

Almost surely, 2^{22221010200121} is an apocalyptic number.

It is an amenable number.

22221010200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221010200121 is an equidigital number, since it uses as much as digits as its factorization.

22221010200121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22221010200121 its reverse (12100201012222), we get a palindrome (34321211212343).

The spelling of 22221010200121 in words is "twenty-two trillion, two hundred twenty-one billion, ten million, two hundred thousand, one hundred twenty-one".