221221022102011 has 2 divisors, whose sum is σ = 221221022102012. Its totient is φ = 221221022102010.

The previous prime is 221221022101997. The next prime is 221221022102107. The reversal of 221221022102011 is 110201220122122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221221022102011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221221022102011.

It is not a weakly prime, because it can be changed into another prime (221221022102111) 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, 110610511051005 + 110610511051006.

It is an arithmetic number, because the mean of its divisors is an integer number (110610511051006).

Almost surely, 2^{221221022102011} is an apocalyptic number.

221221022102011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221022102011 is an equidigital number, since it uses as much as digits as its factorization.

221221022102011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221221022102011 its reverse (110201220122122), we get a palindrome (331422242224133).

The spelling of 221221022102011 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, twenty-two million, one hundred two thousand, eleven".