100111009999 has 24 divisors (see below), whose sum is σ = 135433091360. Its totient is φ = 72007911360.

The previous prime is 100111009979. The next prime is 100111010003. The reversal of 100111009999 is 999900111001.

It is not a de Polignac number, because 100111009999 - 2¹¹ = 100111007951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111009979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4534944 + ... + 4556965.

Almost surely, 2^100111009999 is an apocalyptic number.

100111009999 is a deficient number, since it is larger than the sum of its proper divisors (35322081361).

100111009999 is a wasteful number, since it uses less digits than its factorization.

100111009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091951 (or 9091940 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 100111009999 in words is "one hundred billion, one hundred eleven million, nine thousand, nine hundred ninety-nine".