12520411222144 has 128 divisors (see below), whose sum is σ = 29069354805120. Its totient is φ = 5260936642560.

The previous prime is 12520411222139. The next prime is 12520411222171. The reversal of 12520411222144 is 44122211402521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 8626414 + ... + 9972754.

It is an arithmetic number, because the mean of its divisors is an integer number (227104334415).

Almost surely, 2^{12520411222144} is an apocalyptic number.

12520411222144 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 12520411222144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14534677402560).

12520411222144 is an abundant number, since it is smaller than the sum of its proper divisors (16548943582976).

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

12520411222144 is a wasteful number, since it uses less digits than its factorization.

12520411222144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346566 (or 1346554 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

Adding to 12520411222144 its reverse (44122211402521), we get a palindrome (56642622624665).

The spelling of 12520411222144 in words is "twelve trillion, five hundred twenty billion, four hundred eleven million, two hundred twenty-two thousand, one hundred forty-four".