111011111001100 has 144 divisors (see below), whose sum is σ = 247212974232000. Its totient is φ = 43257931960320.

The previous prime is 111011111001079. The next prime is 111011111001181. The reversal of 111011111001100 is 1100111110111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198741006 + ... + 199298794.

It is an arithmetic number, because the mean of its divisors is an integer number (1716756765500).

Almost surely, 2^{111011111001100} is an apocalyptic number.

111011111001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111011111001100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123606487116000).

111011111001100 is an abundant number, since it is smaller than the sum of its proper divisors (136201863230900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111011111001100 is a wasteful number, since it uses less digits than its factorization.

111011111001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558212 (or 558205 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 111011111001100 its reverse (1100111110111), we get a palindrome (112111222111211).

The spelling of 111011111001100 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, one thousand, one hundred".