221222110 has 16 divisors (see below), whose sum is σ = 398624976. Its totient is φ = 88394368.

The previous prime is 221222087. The next prime is 221222123. The reversal of 221222110 is 11222122.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 1552 + ... + 21091.

It is an arithmetic number, because the mean of its divisors is an integer number (24914061).

Almost surely, 2^221222110 is an apocalyptic number.

221222110 is a deficient number, since it is larger than the sum of its proper divisors (177402866).

221222110 is a wasteful number, since it uses less digits than its factorization.

221222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23627.

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

The square root of 221222110 is about 14873.5372390027. The cubic root of 221222110 is about 604.7968354555.

Adding to 221222110 its reverse (11222122), we get a palindrome (232444232).

The spelling of 221222110 in words is "two hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".