221111220102011 has 2 divisors, whose sum is σ = 221111220102012. Its totient is φ = 221111220102010.

The previous prime is 221111220102007. The next prime is 221111220102061. The reversal of 221111220102011 is 110201022111122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221111220102011 - 2² = 221111220102007 is a prime.

It is not a weakly prime, because it can be changed into another prime (221111220102061) 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, 110555610051005 + 110555610051006.

It is an arithmetic number, because the mean of its divisors is an integer number (110555610051006).

Almost surely, 2^{221111220102011} is an apocalyptic number.

221111220102011 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111220102011 is an equidigital number, since it uses as much as digits as its factorization.

221111220102011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111220102011 its reverse (110201022111122), we get a palindrome (331312242213133).

The spelling of 221111220102011 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twenty million, one hundred two thousand, eleven".