11111100100000 has 144 divisors (see below), whose sum is σ = 27359445180312. Its totient is φ = 4441600000000.

The previous prime is 11111100099943. The next prime is 11111100100019. The reversal of 11111100100000 is 100111111.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 942833232016 + 10168266867984 = 970996^2 + 3188772^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160065300 + ... + 160134700.

Almost surely, 2^{11111100100000} is an apocalyptic number.

11111100100000 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 11111100100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13679722590156).

11111100100000 is an abundant number, since it is smaller than the sum of its proper divisors (16248345080312).

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

11111100100000 is an frugal number, since it uses more digits than its factorization.

11111100100000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71037 (or 71009 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 11111100100000 its reverse (100111111), we get a palindrome (11111200211111).

It can be divided in two parts, 111 and 11100100000, that added together give a palindrome (11100100111).

The spelling of 11111100100000 in words is "eleven trillion, one hundred eleven billion, one hundred million, one hundred thousand".