221102224 has 40 divisors (see below), whose sum is σ = 490359488. Its totient is φ = 94608000.

The previous prime is 221102213. The next prime is 221102227. The reversal of 221102224 is 422201122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 221102198 and 221102207.

It is not an unprimeable number, because it can be changed into a prime (221102227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97099 + ... + 99349.

Almost surely, 2^221102224 is an apocalyptic number.

It is an amenable number.

221102224 is an abundant number, since it is smaller than the sum of its proper divisors (269257264).

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

221102224 is a wasteful number, since it uses less digits than its factorization.

221102224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 221102224 is about 14869.5065150125. The cubic root of 221102224 is about 604.6875640161.

Adding to 221102224 its reverse (422201122), we get a palindrome (643303346).

The spelling of 221102224 in words is "two hundred twenty-one million, one hundred two thousand, two hundred twenty-four".