222221200226161 has 2 divisors, whose sum is σ = 222221200226162. Its totient is φ = 222221200226160.

The previous prime is 222221200226141. The next prime is 222221200226213. The reversal of 222221200226161 is 161622002122222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218311706390625 + 3909493835536 = 14775375^2 + 1977244^2 .

It is a cyclic number.

It is not a de Polignac number, because 222221200226161 - 2³⁹ = 221671444412273 is a prime.

It is not a weakly prime, because it can be changed into another prime (222221200226141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110600113080 + 111110600113081.

It is an arithmetic number, because the mean of its divisors is an integer number (111110600113081).

Almost surely, 2^{222221200226161} is an apocalyptic number.

It is an amenable number.

222221200226161 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221200226161 is an equidigital number, since it uses as much as digits as its factorization.

222221200226161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 222221200226161 its reverse (161622002122222), we get a palindrome (383843202348383).

The spelling of 222221200226161 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred million, two hundred twenty-six thousand, one hundred sixty-one".