11111011109999 has 8 divisors (see below), whose sum is σ = 11696239469040. Its totient is φ = 10525826581056.

The previous prime is 11111011109927. The next prime is 11111011110061. The reversal of 11111011109999 is 99990111011111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11111011109999 - 2⁸ = 11111011109743 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 (11111011109699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10436534 + ... + 11451779.

It is an arithmetic number, because the mean of its divisors is an integer number (1462029933630).

Almost surely, 2^{11111011109999} is an apocalyptic number.

11111011109999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11111011109999 is a deficient number, since it is larger than the sum of its proper divisors (585228359041).

11111011109999 is a wasteful number, since it uses less digits than its factorization.

11111011109999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21915049.

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

The spelling of 11111011109999 in words is "eleven trillion, one hundred eleven billion, eleven million, one hundred nine thousand, nine hundred ninety-nine".