11001122220 has 192 divisors, whose sum is σ = 34018693632. Its totient is φ = 2634240000.

The previous prime is 11001122191. The next prime is 11001122221. The reversal of 11001122220 is 2222110011.

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 = 11001122196 and 11001122205.

It is not an unprimeable number, because it can be changed into a prime (11001122221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27434020 + ... + 27434420.

It is an arithmetic number, because the mean of its divisors is an integer number (177180696).

Almost surely, 2^11001122220 is an apocalyptic number.

11001122220 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 11001122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17009346816).

11001122220 is an abundant number, since it is smaller than the sum of its proper divisors (23017571412).

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

11001122220 is a wasteful number, since it uses less digits than its factorization.

11001122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832 (or 830 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11001122220 its reverse (2222110011), we get a palindrome (13223232231).

It can be divided in two parts, 110011 and 22220, that added together give a palindrome (132231).

The spelling of 11001122220 in words is "eleven billion, one million, one hundred twenty-two thousand, two hundred twenty".