221010110211111 has 16 divisors (see below), whose sum is σ = 317478071397984. Its totient is φ = 135950412737664.

The previous prime is 221010110211097. The next prime is 221010110211119. The reversal of 221010110211111 is 111112011010122.

It is not a de Polignac number, because 221010110211111 - 2⁷ = 221010110210983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010110211119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1162589796 + ... + 1162779881.

It is an arithmetic number, because the mean of its divisors is an integer number (19842379462374).

Almost surely, 2^{221010110211111} is an apocalyptic number.

221010110211111 is a deficient number, since it is larger than the sum of its proper divisors (96467961186873).

221010110211111 is a wasteful number, since it uses less digits than its factorization.

221010110211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325372130.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221010110211111 its reverse (111112011010122), we get a palindrome (332122121221233).

The spelling of 221010110211111 in words is "two hundred twenty-one trillion, ten billion, one hundred ten million, two hundred eleven thousand, one hundred eleven".