13340435401521 has 12 divisors (see below), whose sum is σ = 19269602738100. Its totient is φ = 8893584399840.

The previous prime is 13340435401511. The next prime is 13340435401529. The reversal of 13340435401521 is 12510453404331.

13340435401521 is a `hidden beast` number, since 1 + 3 + 3 + 40 + 43 + 54 + 0 + 1 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5281286591025 + 8059148810496 = 2298105^2 + 2838864^2 .

It is not a de Polignac number, because 13340435401521 - 2³⁰ = 13339361659697 is a prime.

It is a super-2 number, since 2×13340435401521² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13340435401529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1030950 + ... + 5267231.

It is an arithmetic number, because the mean of its divisors is an integer number (1605800228175).

Almost surely, 2^{13340435401521} is an apocalyptic number.

It is an amenable number.

13340435401521 is a deficient number, since it is larger than the sum of its proper divisors (5929167336579).

13340435401521 is a wasteful number, since it uses less digits than its factorization.

13340435401521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533536 (or 6533533 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 13340435401521 its reverse (12510453404331), we get a palindrome (25850888805852).

The spelling of 13340435401521 in words is "thirteen trillion, three hundred forty billion, four hundred thirty-five million, four hundred one thousand, five hundred twenty-one".