1287491712011 has 2 divisors, whose sum is σ = 1287491712012. Its totient is φ = 1287491712010.

The previous prime is 1287491711929. The next prime is 1287491712037. The reversal of 1287491712011 is 1102171947821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287491712011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1287491712071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643745856005 + 643745856006.

It is an arithmetic number, because the mean of its divisors is an integer number (643745856006).

Almost surely, 2^{1287491712011} is an apocalyptic number.

1287491712011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287491712011 is an equidigital number, since it uses as much as digits as its factorization.

1287491712011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 1287491712011 in words is "one trillion, two hundred eighty-seven billion, four hundred ninety-one million, seven hundred twelve thousand, eleven".