222001222 has 4 divisors (see below), whose sum is σ = 333001836. Its totient is φ = 111000610.

The previous prime is 222001201. The next prime is 222001223. The reversal of 222001222 is 222100222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222100222 = 2 ⋅111050111.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500304 + ... + 55500307.

It is an arithmetic number, because the mean of its divisors is an integer number (83250459).

Almost surely, 2^222001222 is an apocalyptic number.

222001222 is a deficient number, since it is larger than the sum of its proper divisors (111000614).

222001222 is a wasteful number, since it uses less digits than its factorization.

222001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111000613.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 222001222 is about 14899.7054333299. The cubic root of 222001222 is about 605.5060056505.

Adding to 222001222 its reverse (222100222), we get a palindrome (444101444).

The spelling of 222001222 in words is "two hundred twenty-two million, one thousand, two hundred twenty-two".