1909091091111 has 8 divisors (see below), whose sum is σ = 2546303568000. Its totient is φ = 1272303004152.

The previous prime is 1909091091079. The next prime is 1909091091143. The reversal of 1909091091111 is 1111901909091.

It is an interprime number because it is at equal distance from previous prime (1909091091079) and next prime (1909091091143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1909091091111 - 2⁵ = 1909091091079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909091091181) 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 7 ways as a sum of consecutive naturals, for example, 106086985 + ... + 106104978.

It is an arithmetic number, because the mean of its divisors is an integer number (318287946000).

Almost surely, 2^{1909091091111} is an apocalyptic number.

1909091091111 is a deficient number, since it is larger than the sum of its proper divisors (637212476889).

1909091091111 is a wasteful number, since it uses less digits than its factorization.

1909091091111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212194965.

The product of its (nonzero) digits is 6561, while the sum is 42.

The spelling of 1909091091111 in words is "one trillion, nine hundred nine billion, ninety-one million, ninety-one thousand, one hundred eleven".