11020021220 has 96 divisors (see below), whose sum is σ = 25333354368. Its totient is φ = 4002250752.

The previous prime is 11020021213. The next prime is 11020021241. The reversal of 11020021220 is 2212002011.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5545067 + ... + 5547053.

It is an arithmetic number, because the mean of its divisors is an integer number (263889108).

Almost surely, 2^11020021220 is an apocalyptic number.

11020021220 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 11020021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12666677184).

11020021220 is an abundant number, since it is smaller than the sum of its proper divisors (14313333148).

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

11020021220 is a wasteful number, since it uses less digits than its factorization.

11020021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11020021220 its reverse (2212002011), we get a palindrome (13232023231).

The spelling of 11020021220 in words is "eleven billion, twenty million, twenty-one thousand, two hundred twenty".