11111100001 has 4 divisors (see below), whose sum is σ = 11347506432. Its totient is φ = 10874693572.

The previous prime is 11111099897. The next prime is 11111100067. The reversal of 11111100001 is 10000111111.

It is a happy number.

11111100001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10000111111 = 89 ⋅112360799.

It is a cyclic number.

It is not a de Polignac number, because 11111100001 - 2⁷ = 11111099873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111100071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 118203145 + ... + 118203238.

It is an arithmetic number, because the mean of its divisors is an integer number (2836876608).

Almost surely, 2^11111100001 is an apocalyptic number.

It is an amenable number.

11111100001 is a deficient number, since it is larger than the sum of its proper divisors (236406431).

11111100001 is an equidigital number, since it uses as much as digits as its factorization.

11111100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236406430.

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

Adding to 11111100001 its reverse (10000111111), we get a palindrome (21111211112).

It can be divided in two parts, 11111 and 100001, that multiplied together give a palindrome (1111111111).

The spelling of 11111100001 in words is "eleven billion, one hundred eleven million, one hundred thousand, one".