221122201211 has 2 divisors, whose sum is σ = 221122201212. Its totient is φ = 221122201210.

The previous prime is 221122201199. The next prime is 221122201241. The reversal of 221122201211 is 112102221122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221122201211 - 2⁶ = 221122201147 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221122201211.

It is not a weakly prime, because it can be changed into another prime (221122201241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561100605 + 110561100606.

It is an arithmetic number, because the mean of its divisors is an integer number (110561100606).

Almost surely, 2^221122201211 is an apocalyptic number.

221122201211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122201211 is an equidigital number, since it uses as much as digits as its factorization.

221122201211 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 17.

Adding to 221122201211 its reverse (112102221122), we get a palindrome (333224422333).

The spelling of 221122201211 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred one thousand, two hundred eleven".