221101224 has 32 divisors (see below), whose sum is σ = 557651520. Its totient is φ = 73047296.

The previous prime is 221101219. The next prime is 221101247. The reversal of 221101224 is 422101122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38052 + ... + 43475.

It is an arithmetic number, because the mean of its divisors is an integer number (17426610).

Almost surely, 2^221101224 is an apocalyptic number.

221101224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221101224 is an abundant number, since it is smaller than the sum of its proper divisors (336550296).

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

221101224 is a wasteful number, since it uses less digits than its factorization.

221101224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81649 (or 81645 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 221101224 is about 14869.4728891108. The cubic root of 221101224 is about 604.6866523888.

Adding to 221101224 its reverse (422101122), we get a palindrome (643202346).

The spelling of 221101224 in words is "two hundred twenty-one million, one hundred one thousand, two hundred twenty-four".