13124420521521 has 8 divisors (see below), whose sum is σ = 17501655478464. Its totient is φ = 8748399622800.

The previous prime is 13124420521517. The next prime is 13124420521547. The reversal of 13124420521521 is 12512502442131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13124420521521 - 2² = 13124420521517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13124420521721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303489330 + ... + 303532571.

It is an arithmetic number, because the mean of its divisors is an integer number (2187706934808).

Almost surely, 2^{13124420521521} is an apocalyptic number.

It is an amenable number.

13124420521521 is a deficient number, since it is larger than the sum of its proper divisors (4377234956943).

13124420521521 is an equidigital number, since it uses as much as digits as its factorization.

13124420521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607029111.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 13124420521521 its reverse (12512502442131), we get a palindrome (25636922963652).

The spelling of 13124420521521 in words is "thirteen trillion, one hundred twenty-four billion, four hundred twenty million, five hundred twenty-one thousand, five hundred twenty-one".