1012009999991 has 2 divisors, whose sum is σ = 1012009999992. Its totient is φ = 1012009999990.

The previous prime is 1012009999969. The next prime is 1012010000039. The reversal of 1012009999991 is 1999999002101.

It is a weak prime.

It is an emirp because it is prime and its reverse (1999999002101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1012009999991 - 2³⁴ = 994830130807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012009999991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012009999901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506004999995 + 506004999996.

It is an arithmetic number, because the mean of its divisors is an integer number (506004999996).

Almost surely, 2^{1012009999991} is an apocalyptic number.

1012009999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012009999991 is an equidigital number, since it uses as much as digits as its factorization.

1012009999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1062882, while the sum is 59.

The spelling of 1012009999991 in words is "one trillion, twelve billion, nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".