13121366244 has 96 divisors (see below), whose sum is σ = 35725245696. Its totient is φ = 3670517760.

The previous prime is 13121366227. The next prime is 13121366261. The reversal of 13121366244 is 44266312131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13121366227) and next prime (13121366261).

It is a nude number because it is divisible by every one of its digits.

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 31 ways as a sum of consecutive naturals, for example, 2316664 + ... + 2322320.

It is an arithmetic number, because the mean of its divisors is an integer number (372137976).

Almost surely, 2^13121366244 is an apocalyptic number.

13121366244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13121366244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17862622848).

13121366244 is an abundant number, since it is smaller than the sum of its proper divisors (22603879452).

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

13121366244 is a wasteful number, since it uses less digits than its factorization.

13121366244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245 (or 6243 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

Adding to 13121366244 its reverse (44266312131), we get a palindrome (57387678375).

The spelling of 13121366244 in words is "thirteen billion, one hundred twenty-one million, three hundred sixty-six thousand, two hundred forty-four".