11031221505440 has 48 divisors (see below), whose sum is σ = 26064156373920. Its totient is φ = 4411998347520.

The previous prime is 11031221505439. The next prime is 11031221505457. The reversal of 11031221505440 is 4450512213011.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2383850 + ... + 5267369.

It is an arithmetic number, because the mean of its divisors is an integer number (543003257790).

Almost surely, 2^{11031221505440} is an apocalyptic number.

11031221505440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031221505440 is an abundant number, since it is smaller than the sum of its proper divisors (15032934868480).

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

11031221505440 is an equidigital number, since it uses as much as digits as its factorization.

11031221505440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7660245 (or 7660237 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 11031221505440 its reverse (4450512213011), we get a palindrome (15481733718451).

The spelling of 11031221505440 in words is "eleven trillion, thirty-one billion, two hundred twenty-one million, five hundred five thousand, four hundred forty".