11223201220 has 96 divisors (see below), whose sum is σ = 29452502016. Its totient is φ = 3490032000.

The previous prime is 11223201211. The next prime is 11223201221. The reversal of 11223201220 is 2210232211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11223201194 and 11223201203.

It is not an unprimeable number, because it can be changed into a prime (11223201221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 673995 + ... + 690445.

It is an arithmetic number, because the mean of its divisors is an integer number (306796896).

Almost surely, 2^11223201220 is an apocalyptic number.

11223201220 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 11223201220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14726251008).

11223201220 is an abundant number, since it is smaller than the sum of its proper divisors (18229300796).

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

11223201220 is a wasteful number, since it uses less digits than its factorization.

11223201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16921 (or 16919 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 11223201220 its reverse (2210232211), we get a palindrome (13433433431).

The spelling of 11223201220 in words is "eleven billion, two hundred twenty-three million, two hundred one thousand, two hundred twenty".