221222 has 8 divisors (see below), whose sum is σ = 338256. Its totient is φ = 108472.

The previous prime is 221219. The next prime is 221227. The reversal of 221222 is 222122.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (42282).

2²²¹²²² is an apocalyptic number.

221222 is a deficient number, since it is larger than the sum of its proper divisors (117034).

221222 is a wasteful number, since it uses less digits than its factorization.

221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142.

The product of its digits is 32, while the sum is 11.

The square root of 221222 is about 470.3424284497. The cubic root of 221222 is about 60.4796735213.

Adding to 221222 its reverse (222122), we get a palindrome (443344).

Subtracting 221222 from its reverse (222122), we obtain a square (900 = 30²).

It can be divided in two parts, 22122 and 2, that multiplied together give a palindrome (44244).

The spelling of 221222 in words is "two hundred twenty-one thousand, two hundred twenty-two", and thus it is an iban number.