221323113 has 12 divisors (see below), whose sum is σ = 348751728. Its totient is φ = 134135160.

The previous prime is 221323111. The next prime is 221323121. The reversal of 221323113 is 311323122.

It is not a de Polignac number, because 221323113 - 2¹ = 221323111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221323111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1117695 + ... + 1117892.

It is an arithmetic number, because the mean of its divisors is an integer number (29062644).

Almost surely, 2^221323113 is an apocalyptic number.

It is an amenable number.

221323113 is a deficient number, since it is larger than the sum of its proper divisors (127428615).

221323113 is a wasteful number, since it uses less digits than its factorization.

221323113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235604 (or 2235601 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 221323113 is about 14876.9322442498. The cubic root of 221323113 is about 604.8888651362. Note that the first 4 decimals are identical.

Adding to 221323113 its reverse (311323122), we get a palindrome (532646235).

Subtracting 221323113 from its reverse (311323122), we obtain a palindrome (90000009).

The spelling of 221323113 in words is "two hundred twenty-one million, three hundred twenty-three thousand, one hundred thirteen".