100110000991 has 32 divisors (see below), whose sum is σ = 135050743296. Its totient is φ = 71665776000.

The previous prime is 100110000967. The next prime is 100110001003. The reversal of 100110000991 is 199000011001.

It is not a de Polignac number, because 100110000991 - 2⁵ = 100110000959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100110000941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25780 + ... + 448201.

It is an arithmetic number, because the mean of its divisors is an integer number (4220335728).

Almost surely, 2^100110000991 is an apocalyptic number.

100110000991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100110000991 is a deficient number, since it is larger than the sum of its proper divisors (34940742305).

100110000991 is a wasteful number, since it uses less digits than its factorization.

100110000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474223.

The product of its (nonzero) digits is 81, while the sum is 22.

Adding to 100110000991 its reverse (199000011001), we get a palindrome (299110011992).

The spelling of 100110000991 in words is "one hundred billion, one hundred ten million, nine hundred ninety-one", and thus it is an aban number.