22112111 has 4 divisors (see below), whose sum is σ = 25270992. Its totient is φ = 18953232.

The previous prime is 22112107. The next prime is 22112141. The reversal of 22112111 is 11121122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22112111 - 2² = 22112107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22112092 and 22112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1579430 + ... + 1579443.

It is an arithmetic number, because the mean of its divisors is an integer number (6317748).

Almost surely, 2^22112111 is an apocalyptic number.

22112111 is a deficient number, since it is larger than the sum of its proper divisors (3158881).

22112111 is an equidigital number, since it uses as much as digits as its factorization.

22112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158880.

The product of its digits is 8, while the sum is 11.

The square root of 22112111 is about 4702.3516457194. The cubic root of 22112111 is about 280.6790956770.

Adding to 22112111 its reverse (11121122), we get a palindrome (33233233).

The spelling of 22112111 in words is "twenty-two million, one hundred twelve thousand, one hundred eleven".