11220222222 has 96 divisors (see below), whose sum is σ = 27969701760. Its totient is φ = 3342345120.

The previous prime is 11220222217. The next prime is 11220222239. The reversal of 11220222222 is 22222202211.

11220222222 is a `hidden beast` number, since 1 + 1 + 220 + 222 + 222 = 666.

It is a super-2 number, since 2×11220222222² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

11220222222 is a modest number, since divided by 222222 gives 11220 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11220222195 and 11220222204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 297628 + ... + 333200.

It is an arithmetic number, because the mean of its divisors is an integer number (291351060).

Almost surely, 2^11220222222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11220222222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13984850880).

11220222222 is an abundant number, since it is smaller than the sum of its proper divisors (16749479538).

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

11220222222 is a wasteful number, since it uses less digits than its factorization.

11220222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35660 (or 35648 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 11220222222 its reverse (22222202211), we get a palindrome (33442424433).

The spelling of 11220222222 in words is "eleven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-two".