221100330 has 32 divisors (see below), whose sum is σ = 578881728. Its totient is φ = 53600000.

The previous prime is 221100323. The next prime is 221100349. The reversal of 221100330 is 33001122.

It is a happy number.

It is a super-2 number, since 2×221100330² = 97770711852217800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334671 + ... + 335330.

It is an arithmetic number, because the mean of its divisors is an integer number (18090054).

Almost surely, 2^221100330 is an apocalyptic number.

221100330 is an abundant number, since it is smaller than the sum of its proper divisors (357781398).

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

221100330 is a wasteful number, since it uses less digits than its factorization.

221100330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670022.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 221100330 is about 14869.4428274902. The cubic root of 221100330 is about 604.6858373917.

Adding to 221100330 its reverse (33001122), we get a palindrome (254101452).

The spelling of 221100330 in words is "two hundred twenty-one million, one hundred thousand, three hundred thirty".