11122222222 has 72 divisors (see below), whose sum is σ = 18758161728. Its totient is φ = 4939737600.

The previous prime is 11122222183. The next prime is 11122222249. The reversal of 11122222222 is 22222222111.

It is a nude number because it is divisible by every one of its digits.

11122222222 is a modest number, since divided by 222222 gives 11122 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11122222222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 39580722 + ... + 39581002.

It is an arithmetic number, because the mean of its divisors is an integer number (260530024).

Almost surely, 2^11122222222 is an apocalyptic number.

11122222222 is a deficient number, since it is larger than the sum of its proper divisors (7635939506).

11122222222 is a wasteful number, since it uses less digits than its factorization.

11122222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 378 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

Adding to 11122222222 its reverse (22222222111), we get a palindrome (33344444333).

It can be divided in two parts, 111 and 22222222, that multiplied together give a palindrome (2466666642).

The spelling of 11122222222 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".