22111100111 has 4 divisors (see below), whose sum is σ = 22473577224. Its totient is φ = 21748623000.

The previous prime is 22111100093. The next prime is 22111100119. The reversal of 22111100111 is 11100111122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111100111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22111100092 and 22111100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111100119) 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, 181238465 + ... + 181238586.

It is an arithmetic number, because the mean of its divisors is an integer number (5618394306).

Almost surely, 2^22111100111 is an apocalyptic number.

22111100111 is a deficient number, since it is larger than the sum of its proper divisors (362477113).

22111100111 is an equidigital number, since it uses as much as digits as its factorization.

22111100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362477112.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 22111100111 its reverse (11100111122), we get a palindrome (33211211233).

The spelling of 22111100111 in words is "twenty-two billion, one hundred eleven million, one hundred thousand, one hundred eleven".