13131021500045 has 4 divisors (see below), whose sum is σ = 15757225800060. Its totient is φ = 10504817200032.

The previous prime is 13131021500027. The next prime is 13131021500053. The reversal of 13131021500045 is 54000512013131.

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 7041152469289 + 6089869030756 = 2653517^2 + 2467766^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131021500045 - 2¹⁰ = 13131021499021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13131021499987 and 13131021500023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313102150000 + ... + 1313102150009.

It is an arithmetic number, because the mean of its divisors is an integer number (3939306450015).

Almost surely, 2^{13131021500045} is an apocalyptic number.

It is an amenable number.

13131021500045 is a deficient number, since it is larger than the sum of its proper divisors (2626204300015).

13131021500045 is an equidigital number, since it uses as much as digits as its factorization.

13131021500045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626204300014.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 13131021500045 its reverse (54000512013131), we get a palindrome (67131533513176).

The spelling of 13131021500045 in words is "thirteen trillion, one hundred thirty-one billion, twenty-one million, five hundred thousand, forty-five".