13121320131323 has 16 divisors (see below), whose sum is σ = 13653005008896. Its totient is φ = 12596437163520.

The previous prime is 13121320131319. The next prime is 13121320131331. The reversal of 13121320131323 is 32313102312131.

It is a cyclic number.

It is not a de Polignac number, because 13121320131323 - 2² = 13121320131319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13121320131292 and 13121320131301.

It is not an unprimeable number, because it can be changed into a prime (13121320131523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30784340 + ... + 31207662.

It is an arithmetic number, because the mean of its divisors is an integer number (853312813056).

Almost surely, 2^{13121320131323} is an apocalyptic number.

13121320131323 is a deficient number, since it is larger than the sum of its proper divisors (531684877573).

13121320131323 is a wasteful number, since it uses less digits than its factorization.

13121320131323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431354.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 13121320131323 its reverse (32313102312131), we get a palindrome (45434422443454).

The spelling of 13121320131323 in words is "thirteen trillion, one hundred twenty-one billion, three hundred twenty million, one hundred thirty-one thousand, three hundred twenty-three".