222112221212 has 24 divisors (see below), whose sum is σ = 444262815360. Its totient is φ = 95182729200.

The previous prime is 222112221197. The next prime is 222112221223. The reversal of 222112221212 is 212122211222.

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, 6914 + ... + 666537.

It is an arithmetic number, because the mean of its divisors is an integer number (18510950640).

Almost surely, 2^222112221212 is an apocalyptic number.

It is an amenable number.

222112221212 is an abundant number, since it is smaller than the sum of its proper divisors (222150594148).

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

222112221212 is a wasteful number, since it uses less digits than its factorization.

222112221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685241 (or 685239 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

Adding to 222112221212 its reverse (212122211222), we get a palindrome (434234432434).

The spelling of 222112221212 in words is "two hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".