11221204240 has 80 divisors (see below), whose sum is σ = 26469734400. Its totient is φ = 4423251456.

The previous prime is 11221204237. The next prime is 11221204249. The reversal of 11221204240 is 4240212211.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (11221204249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4125601 + ... + 4128319.

It is an arithmetic number, because the mean of its divisors is an integer number (330871680).

Almost surely, 2^11221204240 is an apocalyptic number.

11221204240 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 11221204240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13234867200).

11221204240 is an abundant number, since it is smaller than the sum of its proper divisors (15248530160).

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

11221204240 is a wasteful number, since it uses less digits than its factorization.

11221204240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464 (or 3458 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 11221204240 its reverse (4240212211), we get a palindrome (15461416451).

The spelling of 11221204240 in words is "eleven billion, two hundred twenty-one million, two hundred four thousand, two hundred forty".