11223120440 has 32 divisors (see below), whose sum is σ = 28859453280. Its totient is φ = 3847926912.

The previous prime is 11223120439. The next prime is 11223120473. The reversal of 11223120440 is 4402132211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20041007 + ... + 20041566.

It is an arithmetic number, because the mean of its divisors is an integer number (901857915).

Almost surely, 2^11223120440 is an apocalyptic number.

11223120440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11223120440 is an abundant number, since it is smaller than the sum of its proper divisors (17636332840).

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

11223120440 is a wasteful number, since it uses less digits than its factorization.

11223120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40082591 (or 40082587 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11223120440 its reverse (4402132211), we get a palindrome (15625252651).

The spelling of 11223120440 in words is "eleven billion, two hundred twenty-three million, one hundred twenty thousand, four hundred forty".