1009109110091 has 4 divisors (see below), whose sum is σ = 1022932522632. Its totient is φ = 995285697552.

The previous prime is 1009109110073. The next prime is 1009109110129. The reversal of 1009109110091 is 1900119019001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1009109110091 - 2¹⁸ = 1009108847947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009109119091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6911706161 + ... + 6911706306.

It is an arithmetic number, because the mean of its divisors is an integer number (255733130658).

Almost surely, 2^{1009109110091} is an apocalyptic number.

1009109110091 is a deficient number, since it is larger than the sum of its proper divisors (13823412541).

1009109110091 is an equidigital number, since it uses as much as digits as its factorization.

1009109110091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13823412540.

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

The spelling of 1009109110091 in words is "one trillion, nine billion, one hundred nine million, one hundred ten thousand, ninety-one".