13312001131421 has 4 divisors (see below), whose sum is σ = 13312015390812. Its totient is φ = 13311986872032.

The previous prime is 13312001131391. The next prime is 13312001131427. The reversal of 13312001131421 is 12413110021331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12601328527225 + 710672604196 = 3549835^2 + 843014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13312001131421 is a prime.

It is a super-2 number, since 2×13312001131421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13312001131427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5623256 + ... + 7631841.

It is an arithmetic number, because the mean of its divisors is an integer number (3328003847703).

Almost surely, 2^{13312001131421} is an apocalyptic number.

It is an amenable number.

13312001131421 is a deficient number, since it is larger than the sum of its proper divisors (14259391).

13312001131421 is a wasteful number, since it uses less digits than its factorization.

13312001131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14259390.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13312001131421 its reverse (12413110021331), we get a palindrome (25725111152752).

The spelling of 13312001131421 in words is "thirteen trillion, three hundred twelve billion, one million, one hundred thirty-one thousand, four hundred twenty-one".