212222112222 has 16 divisors (see below), whose sum is σ = 427292845200. Its totient is φ = 70265933952.

The previous prime is 212222112187. The next prime is 212222112233. The reversal of 212222112222 is 222211222212.

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

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, 118691563 + ... + 118693350.

It is an arithmetic number, because the mean of its divisors is an integer number (26705802825).

Almost surely, 2^212222112222 is an apocalyptic number.

212222112222 is an abundant number, since it is smaller than the sum of its proper divisors (215070732978).

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

212222112222 is a wasteful number, since it uses less digits than its factorization.

212222112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237385067.

The product of its digits is 512, while the sum is 21.

Adding to 212222112222 its reverse (222211222212), we get a palindrome (434433334434).

The spelling of 212222112222 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-two".