1311231224111 has 2 divisors, whose sum is σ = 1311231224112. Its totient is φ = 1311231224110.

The previous prime is 1311231224089. The next prime is 1311231224119. The reversal of 1311231224111 is 1114221321131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311231224111 - 2¹⁰ = 1311231223087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311231224119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655615612055 + 655615612056.

It is an arithmetic number, because the mean of its divisors is an integer number (655615612056).

Almost surely, 2^{1311231224111} is an apocalyptic number.

1311231224111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311231224111 is an equidigital number, since it uses as much as digits as its factorization.

1311231224111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1311231224111 its reverse (1114221321131), we get a palindrome (2425452545242).

The spelling of 1311231224111 in words is "one trillion, three hundred eleven billion, two hundred thirty-one million, two hundred twenty-four thousand, one hundred eleven".