221200210 has 48 divisors (see below), whose sum is σ = 505284480. Its totient is φ = 68943840.

The previous prime is 221200193. The next prime is 221200211. The reversal of 221200210 is 12002122.

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 (221200211) 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 23 ways as a sum of consecutive naturals, for example, 15130 + ... + 25909.

It is an arithmetic number, because the mean of its divisors is an integer number (10526760).

Almost surely, 2^221200210 is an apocalyptic number.

221200210 is an abundant number, since it is smaller than the sum of its proper divisors (284084270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221200210 is a wasteful number, since it uses less digits than its factorization.

221200210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41071 (or 41064 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221200210 is about 14872.8010139314. The cubic root of 221200210 is about 604.7768774025.

Adding to 221200210 its reverse (12002122), we get a palindrome (233202332).

It can be divided in two parts, 2 and 21200210, that added together give a palindrome (21200212).

The spelling of 221200210 in words is "two hundred twenty-one million, two hundred thousand, two hundred ten".