221221000222 has 8 divisors (see below), whose sum is σ = 349296316200. Its totient is φ = 104788894824.

The previous prime is 221221000199. The next prime is 221221000267. The reversal of 221221000222 is 222000122122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221221000196 and 221221000205.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2910802597 + ... + 2910802672.

It is an arithmetic number, because the mean of its divisors is an integer number (43662039525).

Almost surely, 2^221221000222 is an apocalyptic number.

221221000222 is a deficient number, since it is larger than the sum of its proper divisors (128075315978).

221221000222 is a wasteful number, since it uses less digits than its factorization.

221221000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821605290.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221221000222 its reverse (222000122122), we get a palindrome (443221122344).

The spelling of 221221000222 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two", and thus it is an aban number.