11221231440 has 80 divisors (see below), whose sum is σ = 34818628608. Its totient is φ = 2989506048.

The previous prime is 11221231433. The next prime is 11221231457. The reversal of 11221231440 is 4413212211.

11221231440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239374 + ... + 282386.

Almost surely, 2^11221231440 is an apocalyptic number.

11221231440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221231440 is an abundant number, since it is smaller than the sum of its proper divisors (23597397168).

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

11221231440 is a wasteful number, since it uses less digits than its factorization.

11221231440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44116 (or 44110 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11221231440 its reverse (4413212211), we get a palindrome (15634443651).

The spelling of 11221231440 in words is "eleven billion, two hundred twenty-one million, two hundred thirty-one thousand, four hundred forty".