11111100011100 has 216 divisors, whose sum is σ = 37872424790928. Its totient is φ = 2713298688000.

The previous prime is 11111100011087. The next prime is 11111100011101. The reversal of 11111100011100 is 111000111111.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111100011101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9247626 + ... + 10379825.

It is an arithmetic number, because the mean of its divisors is an integer number (175335299958).

Almost surely, 2^{11111100011100} is an apocalyptic number.

11111100011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111100011100 is an abundant number, since it is smaller than the sum of its proper divisors (26761324779828).

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

11111100011100 is a wasteful number, since it uses less digits than its factorization.

11111100011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19627525 (or 19627515 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 11111100011100 its reverse (111000111111), we get a palindrome (11222100122211).

The spelling of 11111100011100 in words is "eleven trillion, one hundred eleven billion, one hundred million, eleven thousand, one hundred".