111011111009999 has 16 divisors (see below), whose sum is σ = 116561173893120. Its totient is φ = 105523178893440.

The previous prime is 111011111009971. The next prime is 111011111010043. The reversal of 111011111009999 is 999900111110111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111011111009999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011111809999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18250187 + ... + 23560380.

It is an arithmetic number, because the mean of its divisors is an integer number (7285073368320).

Almost surely, 2^{111011111009999} is an apocalyptic number.

111011111009999 is a deficient number, since it is larger than the sum of its proper divisors (5550062883121).

111011111009999 is a wasteful number, since it uses less digits than its factorization.

111011111009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41811310.

The product of its (nonzero) digits is 6561, while the sum is 44.

The spelling of 111011111009999 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, nine thousand, nine hundred ninety-nine".