221030210 has 8 divisors (see below), whose sum is σ = 397854396. Its totient is φ = 88412080.

The previous prime is 221030179. The next prime is 221030231. The reversal of 221030210 is 12030122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219839929 + 1190281 = 14827^2 + 1091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221030191 and 221030200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11051501 + ... + 11051520.

Almost surely, 2^221030210 is an apocalyptic number.

221030210 is a deficient number, since it is larger than the sum of its proper divisors (176824186).

221030210 is a wasteful number, since it uses less digits than its factorization.

221030210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22103028.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221030210 is about 14867.0847848527. The cubic root of 221030210 is about 604.6219070574.

Adding to 221030210 its reverse (12030122), we get a palindrome (233060332).

The spelling of 221030210 in words is "two hundred twenty-one million, thirty thousand, two hundred ten".