221222112011 has 2 divisors, whose sum is σ = 221222112012. Its totient is φ = 221222112010.

The previous prime is 221222111941. The next prime is 221222112017. The reversal of 221222112011 is 110211222122.

221222112011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221222112011 - 2²² = 221217917707 is a prime.

It is not a weakly prime, because it can be changed into another prime (221222112017) 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, 110611056005 + 110611056006.

It is an arithmetic number, because the mean of its divisors is an integer number (110611056006).

Almost surely, 2^221222112011 is an apocalyptic number.

221222112011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222112011 is an equidigital number, since it uses as much as digits as its factorization.

221222112011 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 221222112011 its reverse (110211222122), we get a palindrome (331433334133).

The spelling of 221222112011 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, eleven".