12311441520 has 80 divisors (see below), whose sum is σ = 43617684480. Its totient is φ = 2814043392.

The previous prime is 12311441489. The next prime is 12311441521. The reversal of 12311441520 is 2514411321.

12311441520 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 Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311441521) by changing a digit.

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, 3662440 + ... + 3665799.

It is an arithmetic number, because the mean of its divisors is an integer number (545221056).

Almost surely, 2^12311441520 is an apocalyptic number.

12311441520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12311441520 is an abundant number, since it is smaller than the sum of its proper divisors (31306242960).

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

12311441520 is a wasteful number, since it uses less digits than its factorization.

12311441520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7328262 (or 7328256 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 12311441520 its reverse (2514411321), we get a palindrome (14825852841).

The spelling of 12311441520 in words is "twelve billion, three hundred eleven million, four hundred forty-one thousand, five hundred twenty".