11111100100018 has 4 divisors (see below), whose sum is σ = 16666650150030. Its totient is φ = 5555550050008.

The previous prime is 11111100099943. The next prime is 11111100100019. The reversal of 11111100100018 is 81000100111111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10289127582889 + 821972517129 = 3207667^2 + 906627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11111100099974 and 11111100100010.

It is not an unprimeable number, because it can be changed into a prime (11111100100019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777775025003 + ... + 2777775025006.

Almost surely, 2^{11111100100018} is an apocalyptic number.

11111100100018 is a deficient number, since it is larger than the sum of its proper divisors (5555550050012).

11111100100018 is an equidigital number, since it uses as much as digits as its factorization.

11111100100018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5555550050011.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11111100100018 its reverse (81000100111111), we get a palindrome (92111200211129).

The spelling of 11111100100018 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred thousand, eighteen".