222011212 has 24 divisors (see below), whose sum is σ = 405578880. Its totient is φ = 106212480.

The previous prime is 222011201. The next prime is 222011261. The reversal of 222011212 is 212110222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 222011192 and 222011201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978 + ... + 21094.

It is an arithmetic number, because the mean of its divisors is an integer number (16899120).

Almost surely, 2^222011212 is an apocalyptic number.

It is an amenable number.

222011212 is a deficient number, since it is larger than the sum of its proper divisors (183567668).

222011212 is a wasteful number, since it uses less digits than its factorization.

222011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20241 (or 20239 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 222011212 is about 14900.0406710854. The cubic root of 222011212 is about 605.5150880544.

Adding to 222011212 its reverse (212110222), we get a palindrome (434121434).

The spelling of 222011212 in words is "two hundred twenty-two million, eleven thousand, two hundred twelve".