1311013121287 has 2 divisors, whose sum is σ = 1311013121288. Its totient is φ = 1311013121286.

The previous prime is 1311013121219. The next prime is 1311013121291. The reversal of 1311013121287 is 7821213101131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311013121287 - 2²³ = 1311004732679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311013121207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655506560643 + 655506560644.

It is an arithmetic number, because the mean of its divisors is an integer number (655506560644).

Almost surely, 2^{1311013121287} is an apocalyptic number.

1311013121287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311013121287 is an equidigital number, since it uses as much as digits as its factorization.

1311013121287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The spelling of 1311013121287 in words is "one trillion, three hundred eleven billion, thirteen million, one hundred twenty-one thousand, two hundred eighty-seven".