13131103203121 has 4 divisors (see below), whose sum is σ = 13141787584500. Its totient is φ = 13120418821744.

The previous prime is 13131103203091. The next prime is 13131103203131. The reversal of 13131103203121 is 12130230113131.

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 11316327800625 + 1814775402496 = 3363975^2 + 1347136^2 .

It is a cyclic number.

It is not a de Polignac number, because 13131103203121 - 2¹³ = 13131103194929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131103203092 and 13131103203101.

It is not an unprimeable number, because it can be changed into a prime (13131103203131) 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, 5342188846 + ... + 5342191303.

It is an arithmetic number, because the mean of its divisors is an integer number (3285446896125).

Almost surely, 2^{13131103203121} is an apocalyptic number.

It is an amenable number.

13131103203121 is a deficient number, since it is larger than the sum of its proper divisors (10684381379).

13131103203121 is a wasteful number, since it uses less digits than its factorization.

13131103203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684381378.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 13131103203121 its reverse (12130230113131), we get a palindrome (25261333316252).

The spelling of 13131103203121 in words is "thirteen trillion, one hundred thirty-one billion, one hundred three million, two hundred three thousand, one hundred twenty-one".