11123221300 has 72 divisors (see below), whose sum is σ = 25887405600. Its totient is φ = 4135547520.

The previous prime is 11123221297. The next prime is 11123221309. The reversal of 11123221300 is 312232111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123221309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45471 + ... + 155929.

It is an arithmetic number, because the mean of its divisors is an integer number (359547300).

Almost surely, 2^11123221300 is an apocalyptic number.

11123221300 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 11123221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12943702800).

11123221300 is an abundant number, since it is smaller than the sum of its proper divisors (14764184300).

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

11123221300 is a wasteful number, since it uses less digits than its factorization.

11123221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110545 (or 110538 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11123221300 its reverse (312232111), we get a palindrome (11435453411).

The spelling of 11123221300 in words is "eleven billion, one hundred twenty-three million, two hundred twenty-one thousand, three hundred".