220110111221 has 16 divisors (see below), whose sum is σ = 295532458368. Its totient is φ = 158320958400.

The previous prime is 220110111211. The next prime is 220110111227. The reversal of 220110111221 is 122111011022.

It is a de Polignac number, because none of the positive numbers 2^k-220110111221 is a prime.

It is a super-2 number, since 2×220110111221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220110111196 and 220110111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220110111227) 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 in 15 ways as a sum of consecutive naturals, for example, 109944110 + ... + 109946111.

It is an arithmetic number, because the mean of its divisors is an integer number (18470778648).

Almost surely, 2^220110111221 is an apocalyptic number.

It is an amenable number.

220110111221 is a deficient number, since it is larger than the sum of its proper divisors (75422347147).

220110111221 is a wasteful number, since it uses less digits than its factorization.

220110111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219890252.

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

Adding to 220110111221 its reverse (122111011022), we get a palindrome (342221122243).

The spelling of 220110111221 in words is "two hundred twenty billion, one hundred ten million, one hundred eleven thousand, two hundred twenty-one".