1231344011111 has 2 divisors, whose sum is σ = 1231344011112. Its totient is φ = 1231344011110.

The previous prime is 1231344011039. The next prime is 1231344011167. The reversal of 1231344011111 is 1111104431321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231344011111 - 2³⁰ = 1230270269287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231344011171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615672005555 + 615672005556.

It is an arithmetic number, because the mean of its divisors is an integer number (615672005556).

Almost surely, 2^{1231344011111} is an apocalyptic number.

1231344011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231344011111 is an equidigital number, since it uses as much as digits as its factorization.

1231344011111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 1231344011111 its reverse (1111104431321), we get a palindrome (2342448442432).

The spelling of 1231344011111 in words is "one trillion, two hundred thirty-one billion, three hundred forty-four million, eleven thousand, one hundred eleven".