11111110011111 has 32 divisors (see below), whose sum is σ = 16177317401088. Its totient is φ = 6727465635840.

The previous prime is 11111110011083. The next prime is 11111110011139. The reversal of 11111110011111 is 11111001111111.

It is an interprime number because it is at equal distance from previous prime (11111110011083) and next prime (11111110011139).

It is not a de Polignac number, because 11111110011111 - 2⁶ = 11111110011047 is a prime.

It is a super-2 number, since 2×11111110011111² (a number of 27 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111110011161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203558655 + ... + 203613231.

It is an arithmetic number, because the mean of its divisors is an integer number (505541168784).

Almost surely, 2^{11111110011111} is an apocalyptic number.

11111110011111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111110011111 is a deficient number, since it is larger than the sum of its proper divisors (5066207389977).

11111110011111 is a wasteful number, since it uses less digits than its factorization.

11111110011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60471.

The product of its (nonzero) digits is 1, while the sum is 12.

Adding to 11111110011111 its reverse (11111001111111), we get a palindrome (22222111122222).

It can be divided in two parts, 11 and 111110011111, that multiplied together give a palindrome (1222210122221).

The spelling of 11111110011111 in words is "eleven trillion, one hundred eleven billion, one hundred ten million, eleven thousand, one hundred eleven".