221110210 has 32 divisors (see below), whose sum is σ = 415854000. Its totient is φ = 84537600.

The previous prime is 221110157. The next prime is 221110213. The reversal of 221110210 is 12011122.

It can be written as a sum of positive squares in 8 ways, for example, as 192626641 + 28483569 = 13879^2 + 5337^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (221110213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25516 + ... + 33064.

Almost surely, 2^221110210 is an apocalyptic number.

221110210 is a deficient number, since it is larger than the sum of its proper divisors (194743790).

221110210 is a wasteful number, since it uses less digits than its factorization.

221110210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7686.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 221110210 is about 14869.7750487356. The cubic root of 221110210 is about 604.6948441732.

Adding to 221110210 its reverse (12011122), we get a palindrome (233121332).

It can be divided in two parts, 2211 and 10210, that added together give a palindrome (12421).

The spelling of 221110210 in words is "two hundred twenty-one million, one hundred ten thousand, two hundred ten".