1231111303243 has 2 divisors, whose sum is σ = 1231111303244. Its totient is φ = 1231111303242.

The previous prime is 1231111303181. The next prime is 1231111303249. The reversal of 1231111303243 is 3423031111321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231111303243 - 2⁹ = 1231111302731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231111303249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615555651621 + 615555651622.

It is an arithmetic number, because the mean of its divisors is an integer number (615555651622).

Almost surely, 2^{1231111303243} is an apocalyptic number.

1231111303243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231111303243 is an equidigital number, since it uses as much as digits as its factorization.

1231111303243 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 1231111303243 its reverse (3423031111321), we get a palindrome (4654142414564).

The spelling of 1231111303243 in words is "one trillion, two hundred thirty-one billion, one hundred eleven million, three hundred three thousand, two hundred forty-three".