221222222111 has 8 divisors (see below), whose sum is σ = 241796551248. Its totient is φ = 200725096000.

The previous prime is 221222222099. The next prime is 221222222119. The reversal of 221222222111 is 111222222122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221222222111 - 2⁶ = 221222222047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222222119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19294760 + ... + 19306221.

It is an arithmetic number, because the mean of its divisors is an integer number (30224568906).

Almost surely, 2^221222222111 is an apocalyptic number.

221222222111 is a deficient number, since it is larger than the sum of its proper divisors (20574329137).

221222222111 is a wasteful number, since it uses less digits than its factorization.

221222222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38601513.

The product of its digits is 256, while the sum is 20.

Adding to 221222222111 its reverse (111222222122), we get a palindrome (332444444233).

The spelling of 221222222111 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred eleven".