12013231231 has 2 divisors, whose sum is σ = 12013231232. Its totient is φ = 12013231230.

The previous prime is 12013231207. The next prime is 12013231331. The reversal of 12013231231 is 13213231021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12013231231 - 2¹³ = 12013223039 is a prime.

It is a super-2 number, since 2×12013231231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12013231199 and 12013231208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12013231331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006615615 + 6006615616.

It is an arithmetic number, because the mean of its divisors is an integer number (6006615616).

Almost surely, 2^12013231231 is an apocalyptic number.

12013231231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013231231 is an equidigital number, since it uses as much as digits as its factorization.

12013231231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12013231231 its reverse (13213231021), we get a palindrome (25226462252).

The spelling of 12013231231 in words is "twelve billion, thirteen million, two hundred thirty-one thousand, two hundred thirty-one".