11111111110001 has 8 divisors (see below), whose sum is σ = 13366750207680. Its totient is φ = 9022556389968.

The previous prime is 11111111109979. The next prime is 11111111110031. The reversal of 11111111110001 is 10001111111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111111110001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111111110031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41771094266 + ... + 41771094531.

It is an arithmetic number, because the mean of its divisors is an integer number (1670843775960).

Almost surely, 2^{11111111110001} is an apocalyptic number.

It is an amenable number.

11111111110001 is a deficient number, since it is larger than the sum of its proper divisors (2255639097679).

11111111110001 is an equidigital number, since it uses as much as digits as its factorization.

11111111110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83542188823.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 11111111110001 its reverse (10001111111111), we get a palindrome (21112222221112).

It can be divided in two parts, 111111111 and 10001, that multiplied together give a palindrome (1111222221111).

The spelling of 11111111110001 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred ten thousand, one".