1231231113043 has 2 divisors, whose sum is σ = 1231231113044. Its totient is φ = 1231231113042.

The previous prime is 1231231113011. The next prime is 1231231113083. The reversal of 1231231113043 is 3403111321321.

It is a weak prime.

It is an emirp because it is prime and its reverse (3403111321321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231231113043 - 2⁵ = 1231231113011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231231112999 and 1231231113017.

It is not a weakly prime, because it can be changed into another prime (1231231113083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615615556521 + 615615556522.

It is an arithmetic number, because the mean of its divisors is an integer number (615615556522).

Almost surely, 2^{1231231113043} is an apocalyptic number.

1231231113043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231231113043 is an equidigital number, since it uses as much as digits as its factorization.

1231231113043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1231231113043 its reverse (3403111321321), we get a palindrome (4634342434364).

The spelling of 1231231113043 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred thirteen thousand, forty-three".