22222111110 has 128 divisors (see below), whose sum is σ = 55306782720. Its totient is φ = 5710694400.

The previous prime is 22222111081. The next prime is 22222111133. The reversal of 22222111110 is 1111122222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22222111110.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 54332586 + ... + 54332994.

It is an arithmetic number, because the mean of its divisors is an integer number (432084240).

Almost surely, 2^22222111110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222111110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27653391360).

22222111110 is an abundant number, since it is smaller than the sum of its proper divisors (33084671610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22222111110 is a wasteful number, since it uses less digits than its factorization.

22222111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22222111110 its reverse (1111122222), we get a palindrome (23333233332).

The spelling of 22222111110 in words is "twenty-two billion, two hundred twenty-two million, one hundred eleven thousand, one hundred ten".