221112213 has 16 divisors (see below), whose sum is σ = 337143936. Its totient is φ = 126270720.

The previous prime is 221112191. The next prime is 221112239. The reversal of 221112213 is 312211122.

It is not a de Polignac number, because 221112213 - 2⁹ = 221111701 is a prime.

It is a super-2 number, since 2×221112213² = 97781221475514738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221112192 and 221112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112113) 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, 55033 + ... + 58913.

It is an arithmetic number, because the mean of its divisors is an integer number (21071496).

Almost surely, 2^221112213 is an apocalyptic number.

It is an amenable number.

221112213 is a deficient number, since it is larger than the sum of its proper divisors (116031723).

221112213 is a wasteful number, since it uses less digits than its factorization.

221112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6604.

The product of its digits is 48, while the sum is 15.

The square root of 221112213 is about 14869.8423999718. The cubic root of 221112213 is about 604.6966701105.

Adding to 221112213 its reverse (312211122), we get a palindrome (533323335).

The spelling of 221112213 in words is "two hundred twenty-one million, one hundred twelve thousand, two hundred thirteen".