11222220112220 has 96 divisors (see below), whose sum is σ = 25726062257280. Its totient is φ = 4087309593600.

The previous prime is 11222220112151. The next prime is 11222220112231. The reversal of 11222220112220 is 2221102222211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11222220112192 and 11222220112201.

It is a congruent 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, 6269609 + ... + 7858271.

It is an arithmetic number, because the mean of its divisors is an integer number (267979815180).

Almost surely, 2^{11222220112220} is an apocalyptic number.

11222220112220 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 11222220112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12863031128640).

11222220112220 is an abundant number, since it is smaller than the sum of its proper divisors (14503842145060).

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

11222220112220 is a wasteful number, since it uses less digits than its factorization.

11222220112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589055 (or 1589053 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11222220112220 its reverse (2221102222211), we get a palindrome (13443322334431).

The spelling of 11222220112220 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty".