221222111 has 8 divisors (see below), whose sum is σ = 254035200. Its totient is φ = 190526040.

The previous prime is 221222087. The next prime is 221222123. The reversal of 221222111 is 111222122.

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

It is a cyclic number.

It is not a de Polignac number, because 221222111 - 2¹⁰ = 221221087 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 (221222191) 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, 529031 + ... + 529448.

It is an arithmetic number, because the mean of its divisors is an integer number (31754400).

Almost surely, 2^221222111 is an apocalyptic number.

221222111 is a deficient number, since it is larger than the sum of its proper divisors (32813089).

221222111 is a wasteful number, since it uses less digits than its factorization.

221222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058509.

The product of its digits is 32, while the sum is 14.

The square root of 221222111 is about 14873.5372726194. The cubic root of 221222111 is about 604.7968363668.

Adding to 221222111 its reverse (111222122), we get a palindrome (332444233).

The spelling of 221222111 in words is "two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".