221211102011 has 2 divisors, whose sum is σ = 221211102012. Its totient is φ = 221211102010.

The previous prime is 221211101989. The next prime is 221211102041. The reversal of 221211102011 is 110201112122.

221211102011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221211102011 is a prime.

It is not a weakly prime, because it can be changed into another prime (221211102041) 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, 110605551005 + 110605551006.

It is an arithmetic number, because the mean of its divisors is an integer number (110605551006).

Almost surely, 2^221211102011 is an apocalyptic number.

221211102011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211102011 is an equidigital number, since it uses as much as digits as its factorization.

221211102011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211102011 its reverse (110201112122), we get a palindrome (331412214133).

The spelling of 221211102011 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred two thousand, eleven".