1009100009091 has 4 divisors (see below), whose sum is σ = 1345466678792. Its totient is φ = 672733339392.

The previous prime is 1009100009087. The next prime is 1009100009117. The reversal of 1009100009091 is 1909000019001.

1009100009091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1009100009091 - 2² = 1009100009087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009100009041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168183334846 + ... + 168183334851.

It is an arithmetic number, because the mean of its divisors is an integer number (336366669698).

Almost surely, 2^{1009100009091} is an apocalyptic number.

1009100009091 is a deficient number, since it is larger than the sum of its proper divisors (336366669701).

1009100009091 is an equidigital number, since it uses as much as digits as its factorization.

1009100009091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336366669700.

The product of its (nonzero) digits is 729, while the sum is 30.

The spelling of 1009100009091 in words is "one trillion, nine billion, one hundred million, nine thousand, ninety-one".