11110111111111 has 4 divisors (see below), whose sum is σ = 11114008031224. Its totient is φ = 11106214191000.

The previous prime is 11110111111091. The next prime is 11110111111123. The reversal of 11110111111111 is 11111111101111.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11110111111111 - 2¹¹ = 11110111109063 is a prime.

It is a Duffinian number.

11110111111111 is a modest number, since divided by 1111111 gives 1111011 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11110111111091 and 11110111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110111114111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948455780 + ... + 1948461481.

It is an arithmetic number, because the mean of its divisors is an integer number (2778502007806).

Almost surely, 2^{11110111111111} is an apocalyptic number.

11110111111111 is a deficient number, since it is larger than the sum of its proper divisors (3896920113).

11110111111111 is an equidigital number, since it uses as much as digits as its factorization.

11110111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896920112.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 11110111111111 its reverse (11111111101111), we get a palindrome (22221222212222).

It can be divided in two parts, 111101111 and 11111, that multiplied together give a palindrome (1234444444321).

The spelling of 11110111111111 in words is "eleven trillion, one hundred ten billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".