222221210 has 16 divisors (see below), whose sum is σ = 403960392. Its totient is φ = 88008000.

The previous prime is 222221201. The next prime is 222221221. The reversal of 222221210 is 12122222.

It can be written as a sum of positive squares in 4 ways, for example, as 222099409 + 121801 = 14903^2 + 349^2 .

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, 109001 + ... + 111020.

Almost surely, 2^222221210 is an apocalyptic number.

222221210 is a deficient number, since it is larger than the sum of its proper divisors (181739182).

222221210 is a wasteful number, since it uses less digits than its factorization.

222221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220129.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222221210 is about 14907.0858989945. The cubic root of 222221210 is about 605.7059446111.

Adding to 222221210 its reverse (12122222), we get a palindrome (234343432).

It can be divided in two parts, 2222212 and 10, that added together give a palindrome (2222222).

The spelling of 222221210 in words is "two hundred twenty-two million, two hundred twenty-one thousand, two hundred ten".