222121112212 has 12 divisors (see below), whose sum is σ = 389010276256. Its totient is φ = 110975319000.

The previous prime is 222121112201. The next prime is 222121112231. The reversal of 222121112212 is 212211121222.

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

It is a self number, because there is not a number n which added to its sum of digits gives 222121112212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21303414 + ... + 21313837.

Almost surely, 2^222121112212 is an apocalyptic number.

It is an amenable number.

222121112212 is a deficient number, since it is larger than the sum of its proper divisors (166889164044).

222121112212 is a wasteful number, since it uses less digits than its factorization.

222121112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42618558 (or 42618556 counting only the distinct ones).

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

Adding to 222121112212 its reverse (212211121222), we get a palindrome (434332233434).

The spelling of 222121112212 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twelve".