12013213344 has 96 divisors (see below), whose sum is σ = 35587823040. Its totient is φ = 3514828800.

The previous prime is 12013213343. The next prime is 12013213379. The reversal of 12013213344 is 44331231021.

12013213344 = 5977² + 5978² + ... + 6295².

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is not an unprimeable number, because it can be changed into a prime (12013213343) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 165517 + ... + 226764.

It is an arithmetic number, because the mean of its divisors is an integer number (370706490).

Almost surely, 2^12013213344 is an apocalyptic number.

It is an amenable number.

12013213344 is an abundant number, since it is smaller than the sum of its proper divisors (23574609696).

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

12013213344 is a wasteful number, since it uses less digits than its factorization.

12013213344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392334 (or 392326 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12013213344 its reverse (44331231021), we get a palindrome (56344444365).

The spelling of 12013213344 in words is "twelve billion, thirteen million, two hundred thirteen thousand, three hundred forty-four".