221112443 has 16 divisors (see below), whose sum is σ = 242592000. Its totient is φ = 200727072.

The previous prime is 221112433. The next prime is 221112457. The reversal of 221112443 is 344211122.

It is a cyclic number.

It is not a de Polignac number, because 221112443 - 2⁴ = 221112427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221112403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75146 + ... + 78032.

It is an arithmetic number, because the mean of its divisors is an integer number (15162000).

Almost surely, 2^221112443 is an apocalyptic number.

221112443 is a deficient number, since it is larger than the sum of its proper divisors (21479557).

221112443 is a wasteful number, since it uses less digits than its factorization.

221112443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074.

The product of its digits is 384, while the sum is 20.

The square root of 221112443 is about 14869.8501337438. The cubic root of 221112443 is about 604.6968797780.

Adding to 221112443 its reverse (344211122), we get a palindrome (565323565).

The spelling of 221112443 in words is "two hundred twenty-one million, one hundred twelve thousand, four hundred forty-three".