1311110999971 has 2 divisors, whose sum is σ = 1311110999972. Its totient is φ = 1311110999970.

The previous prime is 1311110999923. The next prime is 1311111000053. The reversal of 1311110999971 is 1799990111131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311110999971 - 2¹⁹ = 1311110475683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311110999071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655555499985 + 655555499986.

It is an arithmetic number, because the mean of its divisors is an integer number (655555499986).

Almost surely, 2^{1311110999971} is an apocalyptic number.

1311110999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311110999971 is an equidigital number, since it uses as much as digits as its factorization.

1311110999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 52.

The spelling of 1311110999971 in words is "one trillion, three hundred eleven billion, one hundred ten million, nine hundred ninety-nine thousand, nine hundred seventy-one".