13131231023 has 4 divisors (see below), whose sum is σ = 13132982640. Its totient is φ = 13129479408.

The previous prime is 13131230989. The next prime is 13131231031. The reversal of 13131231023 is 32013213131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32013213131 = 4957 ⋅6458183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13131231023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131230986 and 13131231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131231053) 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, 864515 + ... + 879572.

It is an arithmetic number, because the mean of its divisors is an integer number (3283245660).

Almost surely, 2^13131231023 is an apocalyptic number.

13131231023 is a deficient number, since it is larger than the sum of its proper divisors (1751617).

13131231023 is an equidigital number, since it uses as much as digits as its factorization.

13131231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1751616.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13131231023 its reverse (32013213131), we get a palindrome (45144444154).

The spelling of 13131231023 in words is "thirteen billion, one hundred thirty-one million, two hundred thirty-one thousand, twenty-three".