1311131021023 has 2 divisors, whose sum is σ = 1311131021024. Its totient is φ = 1311131021022.

The previous prime is 1311131020937. The next prime is 1311131021033. The reversal of 1311131021023 is 3201201311131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311131021023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311131021033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655565510511 + 655565510512.

It is an arithmetic number, because the mean of its divisors is an integer number (655565510512).

Almost surely, 2^{1311131021023} is an apocalyptic number.

1311131021023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311131021023 is an equidigital number, since it uses as much as digits as its factorization.

1311131021023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311131021023 its reverse (3201201311131), we get a palindrome (4512332332154).

The spelling of 1311131021023 in words is "one trillion, three hundred eleven billion, one hundred thirty-one million, twenty-one thousand, twenty-three".