101111111100999 has 12 divisors (see below), whose sum is σ = 146114670787176. Its totient is φ = 67377274438032.

The previous prime is 101111111100971. The next prime is 101111111101001. The reversal of 101111111100999 is 999001111111101.

It is not a de Polignac number, because 101111111100999 - 2⁷ = 101111111100871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101111111100949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2511058969 + ... + 2511099234.

It is an arithmetic number, because the mean of its divisors is an integer number (12176222565598).

Almost surely, 2^{101111111100999} is an apocalyptic number.

101111111100999 is a deficient number, since it is larger than the sum of its proper divisors (45003559686177).

101111111100999 is a wasteful number, since it uses less digits than its factorization.

101111111100999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022160446 (or 5022160443 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 36.

The spelling of 101111111100999 in words is "one hundred one trillion, one hundred eleven billion, one hundred eleven million, one hundred thousand, nine hundred ninety-nine".