11220013220 has 96 divisors (see below), whose sum is σ = 26047308672. Its totient is φ = 4033548288.

The previous prime is 11220013199. The next prime is 11220013253. The reversal of 11220013220 is 2231002211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11220013195 and 11220013204.

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, 3945119 + ... + 3947961.

It is an arithmetic number, because the mean of its divisors is an integer number (271326132).

Almost surely, 2^11220013220 is an apocalyptic number.

11220013220 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 11220013220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13023654336).

11220013220 is an abundant number, since it is smaller than the sum of its proper divisors (14827295452).

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

11220013220 is a wasteful number, since it uses less digits than its factorization.

11220013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3261 (or 3259 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 11220013220 its reverse (2231002211), we get a palindrome (13451015431).

The spelling of 11220013220 in words is "eleven billion, two hundred twenty million, thirteen thousand, two hundred twenty".