13231231231 has 2 divisors, whose sum is σ = 13231231232. Its totient is φ = 13231231230.

The previous prime is 13231231219. The next prime is 13231231261. The reversal of 13231231231 is 13213213231.

13231231231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13213213231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13231231231 - 2¹⁷ = 13231100159 is a prime.

It is a super-2 number, since 2×13231231231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13231231261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615615615 + 6615615616.

It is an arithmetic number, because the mean of its divisors is an integer number (6615615616).

Almost surely, 2^13231231231 is an apocalyptic number.

13231231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231231231 is an equidigital number, since it uses as much as digits as its factorization.

13231231231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 22.

Adding to 13231231231 its reverse (13213213231), we get a palindrome (26444444462).

It can be divided in two parts, 13 and 231231231, that multiplied together give a palindrome (3006006003).

The spelling of 13231231231 in words is "thirteen billion, two hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".