221110222 has 4 divisors (see below), whose sum is σ = 331665336. Its totient is φ = 110555110.

The previous prime is 221110213. The next prime is 221110237. The reversal of 221110222 is 222011122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55277554 + ... + 55277557.

It is an arithmetic number, because the mean of its divisors is an integer number (82916334).

Almost surely, 2^221110222 is an apocalyptic number.

221110222 is a deficient number, since it is larger than the sum of its proper divisors (110555114).

221110222 is a wasteful number, since it uses less digits than its factorization.

221110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110555113.

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

The square root of 221110222 is about 14869.7754522387. The cubic root of 221110222 is about 604.6948551124.

Adding to 221110222 its reverse (222011122), we get a palindrome (443121344).

The spelling of 221110222 in words is "two hundred twenty-one million, one hundred ten thousand, two hundred twenty-two".