11213203220 has 48 divisors (see below), whose sum is σ = 24390147600. Its totient is φ = 4325207040.

The previous prime is 11213203207. The next prime is 11213203241. The reversal of 11213203220 is 2230231211.

It can be written as a sum of positive squares in 8 ways, for example, as 17023876 + 11196179344 = 4126^2 + 105812^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469160 + ... + 492480.

It is an arithmetic number, because the mean of its divisors is an integer number (508128075).

Almost surely, 2^11213203220 is an apocalyptic number.

11213203220 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 11213203220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12195073800).

11213203220 is an abundant number, since it is smaller than the sum of its proper divisors (13176944380).

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

11213203220 is a wasteful number, since it uses less digits than its factorization.

11213203220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24188 (or 24186 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11213203220 its reverse (2230231211), we get a palindrome (13443434431).

The spelling of 11213203220 in words is "eleven billion, two hundred thirteen million, two hundred three thousand, two hundred twenty".