13313143442521 has 8 divisors (see below), whose sum is σ = 14338988312264. Its totient is φ = 12287549560320.

The previous prime is 13313143442513. The next prime is 13313143442531. The reversal of 13313143442521 is 12524434131331.

It can be written as a sum of positive squares in 4 ways, for example, as 7143630400 + 13305999812121 = 84520^2 + 3647739^2 .

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 13313143442521 - 2³ = 13313143442513 is a prime.

It is a super-2 number, since 2×13313143442521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13313143442531) 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, 62636706 + ... + 62848891.

It is an arithmetic number, because the mean of its divisors is an integer number (1792373539033).

Almost surely, 2^{13313143442521} is an apocalyptic number.

It is an amenable number.

13313143442521 is a deficient number, since it is larger than the sum of its proper divisors (1025844869743).

13313143442521 is a wasteful number, since it uses less digits than its factorization.

13313143442521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125493771.

The product of its digits is 103680, while the sum is 37.

Adding to 13313143442521 its reverse (12524434131331), we get a palindrome (25837577573852).

The spelling of 13313143442521 in words is "thirteen trillion, three hundred thirteen billion, one hundred forty-three million, four hundred forty-two thousand, five hundred twenty-one".