11222220 has 48 divisors (see below), whose sum is σ = 32024160. Its totient is φ = 2935296.

The previous prime is 11222219. The next prime is 11222243. The reversal of 11222220 is 2222211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11222196 and 11222205.

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 15 ways as a sum of consecutive naturals, for example, 1416 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (667170).

Almost surely, 2^11222220 is an apocalyptic number.

11222220 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 11222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16012080).

11222220 is an abundant number, since it is smaller than the sum of its proper divisors (20801940).

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

11222220 is a wasteful number, since it uses less digits than its factorization.

11222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 11222220 is about 3349.9582086946. The cubic root of 11222220 is about 223.8856506070.

Adding to 11222220 its reverse (2222211), we get a palindrome (13444431).

Subtracting from 11222220 its reverse (2222211), we obtain a palindrome (9000009).

It can be divided in two parts, 1 and 1222220, that added together give a palindrome (1222221).

The spelling of 11222220 in words is "eleven million, two hundred twenty-two thousand, two hundred twenty".