212222 has 8 divisors (see below), whose sum is σ = 329400. Its totient is φ = 102424.

The previous prime is 212209. The next prime is 212227. The reversal of 212222 is 222212.

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.

212222 is a modest number, since divided by 222 gives 212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212227) by changing a digit.

212222 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1772 + ... + 1887.

It is an arithmetic number, because the mean of its divisors is an integer number (41175).

2²¹²²²² is an apocalyptic number.

212222 is a deficient number, since it is larger than the sum of its proper divisors (117178).

212222 is a wasteful number, since it uses less digits than its factorization.

212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690.

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

The square root of 212222 is about 460.6755908446. The cubic root of 212222 is about 59.6481256263.

Adding to 212222 its reverse (222212), we get a palindrome (434434).

It can be divided in two parts, 212 and 222, that added together give a palindrome (434).

The spelling of 212222 in words is "two hundred twelve thousand, two hundred twenty-two", and thus it is an iban number.