221123222 has 8 divisors (see below), whose sum is σ = 331752672. Its totient is φ = 110539000.

The previous prime is 221123213. The next prime is 221123251. The reversal of 221123222 is 222321122.

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

It is a super-2 number, since 2×221123222² = 97790958615322568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221123222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6572 + ... + 22032.

It is an arithmetic number, because the mean of its divisors is an integer number (41469084).

Almost surely, 2^221123222 is an apocalyptic number.

221123222 is a deficient number, since it is larger than the sum of its proper divisors (110629450).

221123222 is a wasteful number, since it uses less digits than its factorization.

221123222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22614.

The product of its digits is 192, while the sum is 17.

The square root of 221123222 is about 14870.2125741363. The cubic root of 221123222 is about 604.7067057315.

Adding to 221123222 its reverse (222321122), we get a palindrome (443444344).

The spelling of 221123222 in words is "two hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-two".