1000111091909 has 2 divisors, whose sum is σ = 1000111091910. Its totient is φ = 1000111091908.

The previous prime is 1000111091899. The next prime is 1000111091977. The reversal of 1000111091909 is 9091901110001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666745737025 + 333365354884 = 816545^2 + 577378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000111091909 - 2²⁴ = 1000094314693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000111096909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500055545954 + 500055545955.

It is an arithmetic number, because the mean of its divisors is an integer number (500055545955).

Almost surely, 2^{1000111091909} is an apocalyptic number.

It is an amenable number.

1000111091909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000111091909 is an equidigital number, since it uses as much as digits as its factorization.

1000111091909 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 1000111091909 in words is "one trillion, one hundred eleven million, ninety-one thousand, nine hundred nine".