221011222102201 has 2 divisors, whose sum is σ = 221011222102202. Its totient is φ = 221011222102200.

The previous prime is 221011222102171. The next prime is 221011222102261. The reversal of 221011222102201 is 102201222110122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188859192186025 + 32152029916176 = 13742605^2 + 5670276^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011222102201 - 2¹⁷ = 221011221971129 is a prime.

It is not a weakly prime, because it can be changed into another prime (221011222102261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505611051100 + 110505611051101.

It is an arithmetic number, because the mean of its divisors is an integer number (110505611051101).

Almost surely, 2^{221011222102201} is an apocalyptic number.

It is an amenable number.

221011222102201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011222102201 is an equidigital number, since it uses as much as digits as its factorization.

221011222102201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221011222102201 its reverse (102201222110122), we get a palindrome (323212444212323).

The spelling of 221011222102201 in words is "two hundred twenty-one trillion, eleven billion, two hundred twenty-two million, one hundred two thousand, two hundred one".