222200121212 has 12 divisors (see below), whose sum is σ = 394326976176.
Its totient is φ = 109535270880.
The previous prime is 222200121167. The next prime is 222200121217. The reversal of 222200121212 is 212121002222.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (222200121217) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391197113 + ... + 391197680.
It is an arithmetic number, because the mean of its divisors is an integer number (32860581348).
Almost surely, 2222200121212 is an apocalyptic number.
It is an amenable number.
222200121212 is a deficient number, since it is larger than the sum of its proper divisors (172126854964).
222200121212 is a wasteful number, since it uses less digits than its factorization.
222200121212 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 782394868 (or 782394866 counting only the distinct ones).
The product of its (nonzero) digits is 128, while the sum is 17.
Adding to 222200121212 its reverse (212121002222), we get a palindrome (434321123434).
The spelling of 222200121212 in words is "two hundred twenty-two billion, two hundred million, one hundred twenty-one thousand, two hundred twelve".