13251711205421 has 8 divisors (see below), whose sum is σ = 14574713470464. Its totient is φ = 11972086063920.

The previous prime is 13251711205393. The next prime is 13251711205429. The reversal of 13251711205421 is 12450211715231.

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 13251711205421 - 2¹⁸ = 13251710943277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251711205429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10844280245 + ... + 10844281466.

It is an arithmetic number, because the mean of its divisors is an integer number (1821839183808).

Almost surely, 2^{13251711205421} is an apocalyptic number.

It is an amenable number.

13251711205421 is a deficient number, since it is larger than the sum of its proper divisors (1323002265043).

13251711205421 is a wasteful number, since it uses less digits than its factorization.

13251711205421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21688561771.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 13251711205421 in words is "thirteen trillion, two hundred fifty-one billion, seven hundred eleven million, two hundred five thousand, four hundred twenty-one".