22122220111 has 4 divisors (see below), whose sum is σ = 23084055792. Its totient is φ = 21160384432.

The previous prime is 22122220033. The next prime is 22122220121. The reversal of 22122220111 is 11102222122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11102222122 = 2 ⋅5551111061.

It is a cyclic number.

It is not a de Polignac number, because 22122220111 - 2²⁵ = 22088665679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22122220121) 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 3 ways as a sum of consecutive naturals, for example, 480917806 + ... + 480917851.

It is an arithmetic number, because the mean of its divisors is an integer number (5771013948).

Almost surely, 2^22122220111 is an apocalyptic number.

22122220111 is a deficient number, since it is larger than the sum of its proper divisors (961835681).

22122220111 is an equidigital number, since it uses as much as digits as its factorization.

22122220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961835680.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22122220111 its reverse (11102222122), we get a palindrome (33224442233).

The spelling of 22122220111 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".