13217122870521 has 8 divisors (see below), whose sum is σ = 18659467581984. Its totient is φ = 8293096703040.

The previous prime is 13217122870519. The next prime is 13217122870531. The reversal of 13217122870521 is 12507822171231.

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

It is not a de Polignac number, because 13217122870521 - 2¹ = 13217122870519 is a prime.

It is a super-3 number, since 3×13217122870521³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13217122870531) 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, 129579635935 + ... + 129579636036.

It is an arithmetic number, because the mean of its divisors is an integer number (2332433447748).

Almost surely, 2^{13217122870521} is an apocalyptic number.

It is an amenable number.

13217122870521 is a deficient number, since it is larger than the sum of its proper divisors (5442344711463).

13217122870521 is a wasteful number, since it uses less digits than its factorization.

13217122870521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259159271991.

The product of its (nonzero) digits is 94080, while the sum is 42.

The spelling of 13217122870521 in words is "thirteen trillion, two hundred seventeen billion, one hundred twenty-two million, eight hundred seventy thousand, five hundred twenty-one".