221111100223 has 4 divisors (see below), whose sum is σ = 238119646408. Its totient is φ = 204102554040.

The previous prime is 221111100191. The next prime is 221111100227. The reversal of 221111100223 is 322001111122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221111100223 - 2⁵ = 221111100191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221111100197 and 221111100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111100227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8504273073 + ... + 8504273098.

It is an arithmetic number, because the mean of its divisors is an integer number (59529911602).

Almost surely, 2^221111100223 is an apocalyptic number.

221111100223 is a deficient number, since it is larger than the sum of its proper divisors (17008546185).

221111100223 is a wasteful number, since it uses less digits than its factorization.

221111100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17008546184.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221111100223 its reverse (322001111122), we get a palindrome (543112211345).

The spelling of 221111100223 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred twenty-three".