111222213 has 4 divisors (see below), whose sum is σ = 148296288. Its totient is φ = 74148140.

The previous prime is 111222193. The next prime is 111222229. The reversal of 111222213 is 312222111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111222213 - 2²² = 107027909 is a prime.

It is a super-3 number, since 3×111222213³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111222192 and 111222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18537033 + ... + 18537038.

It is an arithmetic number, because the mean of its divisors is an integer number (37074072).

Almost surely, 2^111222213 is an apocalyptic number.

It is an amenable number.

111222213 is a deficient number, since it is larger than the sum of its proper divisors (37074075).

111222213 is an equidigital number, since it uses as much as digits as its factorization.

111222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37074074.

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

The square root of 111222213 is about 10546.1942424744. The cubic root of 111222213 is about 480.9100400425.

Adding to 111222213 its reverse (312222111), we get a palindrome (423444324).

The spelling of 111222213 in words is "one hundred eleven million, two hundred twenty-two thousand, two hundred thirteen".