11111101100100 has 216 divisors, whose sum is σ = 35010659716032. Its totient is φ = 2947379270400.

The previous prime is 11111101100093. The next prime is 11111101100101. The reversal of 11111101100100 is 100110111111.

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

It is not an unprimeable number, because it can be changed into a prime (11111101100101) 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, 163525734 + ... + 163593666.

Almost surely, 2^{11111101100100} is an apocalyptic number.

11111101100100 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 11111101100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17505329858016).

11111101100100 is an abundant number, since it is smaller than the sum of its proper divisors (23899558615932).

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

11111101100100 is a wasteful number, since it uses less digits than its factorization.

11111101100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68907 (or 68897 counting only the distinct ones).

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

Adding to 11111101100100 its reverse (100110111111), we get a palindrome (11211211211211).

The spelling of 11111101100100 in words is "eleven trillion, one hundred eleven billion, one hundred one million, one hundred thousand, one hundred".