1000191091911 has 32 divisors (see below), whose sum is σ = 1463575948800. Its totient is φ = 602535542400.

The previous prime is 1000191091909. The next prime is 1000191091931. The reversal of 1000191091911 is 1191901910001.

It is not a de Polignac number, because 1000191091911 - 2¹ = 1000191091909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000191091931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6630321 + ... + 6779493.

It is an arithmetic number, because the mean of its divisors is an integer number (45736748400).

Almost surely, 2^{1000191091911} is an apocalyptic number.

1000191091911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000191091911 is a deficient number, since it is larger than the sum of its proper divisors (463384856889).

1000191091911 is a wasteful number, since it uses less digits than its factorization.

1000191091911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150407.

The product of its (nonzero) digits is 729, while the sum is 33.

The spelling of 1000191091911 in words is "one trillion, one hundred ninety-one million, ninety-one thousand, nine hundred eleven".