22111111111 has 8 divisors (see below), whose sum is σ = 23121880704. Its totient is φ = 21104459640.

The previous prime is 22111111097. The next prime is 22111111123. The reversal of 22111111111 is 11111111122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22111111111 - 2⁹ = 22111110599 is a prime.

It is a Duffinian number.

22111111111 is a modest number, since divided by 111111 gives 22111 as remainder.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 22111111091 and 22111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111111811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018545 + ... + 1040026.

It is an arithmetic number, because the mean of its divisors is an integer number (2890235088).

Almost surely, 2^22111111111 is an apocalyptic number.

22111111111 is a deficient number, since it is larger than the sum of its proper divisors (1010769593).

22111111111 is a wasteful number, since it uses less digits than its factorization.

22111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059061.

The product of its digits is 4, while the sum is 13.

Adding to 22111111111 its reverse (11111111122), we get a palindrome (33222222233).

It can be divided in two parts, 221111111 and 11, that added together give a palindrome (221111122).

The spelling of 22111111111 in words is "twenty-two billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".