222121606 has 24 divisors (see below), whose sum is σ = 388997640. Its totient is φ = 94846752.

The previous prime is 222121589. The next prime is 222121673. The reversal of 222121606 is 606121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23730 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (16208235).

Almost surely, 2^222121606 is an apocalyptic number.

222121606 is a deficient number, since it is larger than the sum of its proper divisors (166876034).

222121606 is a wasteful number, since it uses less digits than its factorization.

222121606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8308 (or 8301 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 222121606 is about 14903.7446972229. The cubic root of 222121606 is about 605.6154345723.

Adding to 222121606 its reverse (606121222), we get a palindrome (828242828).

The spelling of 222121606 in words is "two hundred twenty-two million, one hundred twenty-one thousand, six hundred six".