13131321013 has 4 divisors (see below), whose sum is σ = 13134232620. Its totient is φ = 13128409408.

The previous prime is 13131321011. The next prime is 13131321019. The reversal of 13131321013 is 31012313131.

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 6918413329 + 6212907684 = 83177^2 + 78822^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131321013 - 2¹ = 13131321011 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 (13131321011) 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, 1449028 + ... + 1458061.

It is an arithmetic number, because the mean of its divisors is an integer number (3283558155).

Almost surely, 2^13131321013 is an apocalyptic number.

It is an amenable number.

13131321013 is a deficient number, since it is larger than the sum of its proper divisors (2911607).

13131321013 is an equidigital number, since it uses as much as digits as its factorization.

13131321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911606.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 13131321013 its reverse (31012313131), we get a palindrome (44143634144).

The spelling of 13131321013 in words is "thirteen billion, one hundred thirty-one million, three hundred twenty-one thousand, thirteen".