11111000001111 has 6 divisors (see below), whose sum is σ = 16049222223840. Its totient is φ = 7407333334068.

The previous prime is 11111000001089. The next prime is 11111000001131. The reversal of 11111000001111 is 11110000011111.

It is not a de Polignac number, because 11111000001111 - 2⁷ = 11111000000983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1234555555679 = 11111000001111 / (1 + 1 + 1 + 1 + 1 + 0 + 0 + 0 + 0 + 0 + 1 + 1 + 1 + 1).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 11111000001093 and 11111000001102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111000001131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617277777831 + ... + 617277777848.

It is an arithmetic number, because the mean of its divisors is an integer number (2674870370640).

Almost surely, 2^{11111000001111} is an apocalyptic number.

11111000001111 is a deficient number, since it is larger than the sum of its proper divisors (4938222222729).

11111000001111 is a wasteful number, since it uses less digits than its factorization.

11111000001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234555555685 (or 1234555555682 counting only the distinct ones).

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

Adding to 11111000001111 its reverse (11110000011111), we get a palindrome (22221000012222).

The spelling of 11111000001111 in words is "eleven trillion, one hundred eleven billion, one thousand, one hundred eleven".