221000222108201 has 2 divisors, whose sum is σ = 221000222108202. Its totient is φ = 221000222108200.

The previous prime is 221000222108191. The next prime is 221000222108203. The reversal of 221000222108201 is 102801222000122.

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., 132414478108201 + 88585744000000 = 11507149^2 + 9412000^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000222108201 - 2¹⁸ = 221000221846057 is a prime.

Together with 221000222108203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221000222108203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500111054100 + 110500111054101.

It is an arithmetic number, because the mean of its divisors is an integer number (110500111054101).

Almost surely, 2^{221000222108201} is an apocalyptic number.

It is an amenable number.

221000222108201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000222108201 is an equidigital number, since it uses as much as digits as its factorization.

221000222108201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221000222108201 its reverse (102801222000122), we get a palindrome (323801444108323).

The spelling of 221000222108201 in words is "two hundred twenty-one trillion, two hundred twenty-two million, one hundred eight thousand, two hundred one".