11011122220 has 72 divisors (see below), whose sum is σ = 26926754400. Its totient is φ = 3771290880.

The previous prime is 11011122217. The next prime is 11011122223. The reversal of 11011122220 is 2222111011.

It is an interprime number because it is at equal distance from previous prime (11011122217) and next prime (11011122223).

It is a self number, because there is not a number n which added to its sum of digits gives 11011122220.

It is not an unprimeable number, because it can be changed into a prime (11011122223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1022665 + ... + 1033375.

It is an arithmetic number, because the mean of its divisors is an integer number (373982700).

Almost surely, 2^11011122220 is an apocalyptic number.

11011122220 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 11011122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13463377200).

11011122220 is an abundant number, since it is smaller than the sum of its proper divisors (15915632180).

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

11011122220 is a wasteful number, since it uses less digits than its factorization.

11011122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11783 (or 11774 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11011122220 its reverse (2222111011), we get a palindrome (13233233231).

The spelling of 11011122220 in words is "eleven billion, eleven million, one hundred twenty-two thousand, two hundred twenty".