222221221111 has 8 divisors (see below), whose sum is σ = 222565754880. Its totient is φ = 221876915712.

The previous prime is 222221221109. The next prime is 222221221139. The reversal of 222221221111 is 111122122222.

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 222221221111 - 2¹ = 222221221109 is a prime.

It is a super-2 number, since 2×222221221111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221221811) 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, 1944586 + ... + 2055688.

It is an arithmetic number, because the mean of its divisors is an integer number (27820719360).

Almost surely, 2^222221221111 is an apocalyptic number.

222221221111 is a deficient number, since it is larger than the sum of its proper divisors (344533769).

222221221111 is a wasteful number, since it uses less digits than its factorization.

222221221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114185.

The product of its digits is 128, while the sum is 19.

Adding to 222221221111 its reverse (111122122222), we get a palindrome (333343343333).

The spelling of 222221221111 in words is "two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".