11222112220 has 96 divisors (see below), whose sum is σ = 26687711232. Its totient is φ = 3926880000.

The previous prime is 11222112211. The next prime is 11222112227. The reversal of 11222112220 is 2221122211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11222112194 and 11222112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222112227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1229875 + ... + 1238965.

It is an arithmetic number, because the mean of its divisors is an integer number (277996992).

Almost surely, 2^11222112220 is an apocalyptic number.

11222112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11222112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13343855616).

11222112220 is an abundant number, since it is smaller than the sum of its proper divisors (15465599012).

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

11222112220 is a wasteful number, since it uses less digits than its factorization.

11222112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323 (or 9321 counting only the distinct ones).

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

Adding to 11222112220 its reverse (2221122211), we get a palindrome (13443234431).

Subtracting from 11222112220 its reverse (2221122211), we obtain a palindrome (9000990009).

It can be divided in two parts, 1 and 1222112220, that added together give a palindrome (1222112221).

The spelling of 11222112220 in words is "eleven billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty".