221112222 has 16 divisors (see below), whose sum is σ = 454176912. Its totient is φ = 71712000.

The previous prime is 221112191. The next prime is 221112239. The reversal of 221112222 is 222211122.

It is a super-2 number, since 2×221112222² = 97781229435554568, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497779 + ... + 498222.

It is an arithmetic number, because the mean of its divisors is an integer number (28386057).

Almost surely, 2^221112222 is an apocalyptic number.

221112222 is an abundant number, since it is smaller than the sum of its proper divisors (233064690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221112222 is a wasteful number, since it uses less digits than its factorization.

221112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996043.

The product of its digits is 64, while the sum is 15.

The square root of 221112222 is about 14869.8427025978. The cubic root of 221112222 is about 604.6966783148.

Adding to 221112222 its reverse (222211122), we get a palindrome (443323344).

It can be divided in two parts, 2211122 and 22, that multiplied together give a palindrome (48644684).

The spelling of 221112222 in words is "two hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".