11201222220 has 96 divisors (see below), whose sum is σ = 32142012672. Its totient is φ = 2913055488.

The previous prime is 11201222183. The next prime is 11201222243. The reversal of 11201222220 is 2222210211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11201222220.

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, 1888179 + ... + 1894101.

It is an arithmetic number, because the mean of its divisors is an integer number (334812632).

Almost surely, 2^11201222220 is an apocalyptic number.

11201222220 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 11201222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16071006336).

11201222220 is an abundant number, since it is smaller than the sum of its proper divisors (20940790452).

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

11201222220 is a wasteful number, since it uses less digits than its factorization.

11201222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6711 (or 6709 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11201222220 its reverse (2222210211), we get a palindrome (13423432431).

The spelling of 11201222220 in words is "eleven billion, two hundred one million, two hundred twenty-two thousand, two hundred twenty".