13124450535521 has 8 divisors (see below), whose sum is σ = 14145675792360. Its totient is φ = 12104889869952.

The previous prime is 13124450535491. The next prime is 13124450535541. The reversal of 13124450535521 is 12553505442131.

It can be written as a sum of positive squares in 4 ways, for example, as 1472980304896 + 11651470230625 = 1213664^2 + 3413425^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13124450535521 - 2³⁸ = 12849572628577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13124450535541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416131436 + ... + 416162973.

It is an arithmetic number, because the mean of its divisors is an integer number (1768209474045).

Almost surely, 2^{13124450535521} is an apocalyptic number.

It is an amenable number.

13124450535521 is a deficient number, since it is larger than the sum of its proper divisors (1021225256839).

13124450535521 is a wasteful number, since it uses less digits than its factorization.

13124450535521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832295635.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 13124450535521 its reverse (12553505442131), we get a palindrome (25677955977652).

The spelling of 13124450535521 in words is "thirteen trillion, one hundred twenty-four billion, four hundred fifty million, five hundred thirty-five thousand, five hundred twenty-one".