13103731226501 has 4 divisors (see below), whose sum is σ = 13103868194412. Its totient is φ = 13103594258592.

The previous prime is 13103731226497. The next prime is 13103731226563. The reversal of 13103731226501 is 10562213730131.

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 13010629350625 + 93101875876 = 3607025^2 + 305126^2 .

It is a cyclic number.

It is not a de Polignac number, because 13103731226501 - 2² = 13103731226497 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 (13103731226591) 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, 68340350 + ... + 68531823.

It is an arithmetic number, because the mean of its divisors is an integer number (3275967048603).

Almost surely, 2^{13103731226501} is an apocalyptic number.

It is an amenable number.

13103731226501 is a deficient number, since it is larger than the sum of its proper divisors (136967911).

13103731226501 is an equidigital number, since it uses as much as digits as its factorization.

13103731226501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136967910.

The product of its (nonzero) digits is 22680, while the sum is 35.

Adding to 13103731226501 its reverse (10562213730131), we get a palindrome (23665944956632).

The spelling of 13103731226501 in words is "thirteen trillion, one hundred three billion, seven hundred thirty-one million, two hundred twenty-six thousand, five hundred one".