11231324440 has 32 divisors (see below), whose sum is σ = 28880549280. Its totient is φ = 3850739712.

The previous prime is 11231324437. The next prime is 11231324501. The reversal of 11231324440 is 4442313211.

It is a super-2 number, since 2×11231324440² (a number of 21 digits) contains 22 as substring.

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, 20055657 + ... + 20056216.

It is an arithmetic number, because the mean of its divisors is an integer number (902517165).

Almost surely, 2^11231324440 is an apocalyptic number.

11231324440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11231324440 is an abundant number, since it is smaller than the sum of its proper divisors (17649224840).

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

11231324440 is a wasteful number, since it uses less digits than its factorization.

11231324440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40111891 (or 40111887 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 11231324440 its reverse (4442313211), we get a palindrome (15673637651).

The spelling of 11231324440 in words is "eleven billion, two hundred thirty-one million, three hundred twenty-four thousand, four hundred forty".