22220111 has 4 divisors (see below), whose sum is σ = 22229832. Its totient is φ = 22210392.

The previous prime is 22220083. The next prime is 22220113. The reversal of 22220111 is 11102222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11102222 = 2 ⋅5551111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22220111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22220092 and 22220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220113) 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, 656 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (5557458).

Almost surely, 2^22220111 is an apocalyptic number.

22220111 is a deficient number, since it is larger than the sum of its proper divisors (9721).

22220111 is an equidigital number, since it uses as much as digits as its factorization.

22220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9720.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 22220111 is about 4713.8212736590. The cubic root of 22220111 is about 281.1353181164.

Adding to 22220111 its reverse (11102222), we get a palindrome (33322333).

The spelling of 22220111 in words is "twenty-two million, two hundred twenty thousand, one hundred eleven".