221022122222201 has 2 divisors, whose sum is σ = 221022122222202. Its totient is φ = 221022122222200.

The previous prime is 221022122222189. The next prime is 221022122222261. The reversal of 221022122222201 is 102222221220122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170639382535801 + 50382739686400 = 13062901^2 + 7098080^2 .

It is a cyclic number.

It is not a de Polignac number, because 221022122222201 - 2¹⁰ = 221022122221177 is a prime.

It is a super-2 number, since 2×221022122222201² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221022122222261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110511061111100 + 110511061111101.

It is an arithmetic number, because the mean of its divisors is an integer number (110511061111101).

Almost surely, 2^{221022122222201} is an apocalyptic number.

It is an amenable number.

221022122222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221022122222201 is an equidigital number, since it uses as much as digits as its factorization.

221022122222201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221022122222201 its reverse (102222221220122), we get a palindrome (323244343442323).

The spelling of 221022122222201 in words is "two hundred twenty-one trillion, twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred one".