1001111000999 has 2 divisors, whose sum is σ = 1001111001000. Its totient is φ = 1001111000998.

The previous prime is 1001111000927. The next prime is 1001111001001. The reversal of 1001111000999 is 9990001111001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001111000999 - 2¹² = 1001110996903 is a prime.

It is a Sophie Germain prime.

Together with 1001111001001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001111000399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500555500499 + 500555500500.

It is an arithmetic number, because the mean of its divisors is an integer number (500555500500).

Almost surely, 2^{1001111000999} is an apocalyptic number.

1001111000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001111000999 is an equidigital number, since it uses as much as digits as its factorization.

1001111000999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 1001111000999 in words is "one trillion, one billion, one hundred eleven million, nine hundred ninety-nine", and thus it is an aban number.