1311838104091 has 2 divisors, whose sum is σ = 1311838104092. Its totient is φ = 1311838104090.

The previous prime is 1311838104067. The next prime is 1311838104167. The reversal of 1311838104091 is 1904018381131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311838104091 - 2³¹ = 1309690620443 is a prime.

It is a super-2 number, since 2×1311838104091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311838104001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655919052045 + 655919052046.

It is an arithmetic number, because the mean of its divisors is an integer number (655919052046).

Almost surely, 2^{1311838104091} is an apocalyptic number.

1311838104091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311838104091 is an equidigital number, since it uses as much as digits as its factorization.

1311838104091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

It can be divided in two parts, 13118381040 and 91, that added together give a palindrome (13118381131).

The spelling of 1311838104091 in words is "one trillion, three hundred eleven billion, eight hundred thirty-eight million, one hundred four thousand, ninety-one".