11111111011 has 48 divisors (see below), whose sum is σ = 15518165760. Its totient is φ = 7716159360.

The previous prime is 11111110979. The next prime is 11111111059. The reversal of 11111111011 is 11011111111.

It is a happy number.

It is not a de Polignac number, because 11111111011 - 2⁵ = 11111110979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111111611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362656 + ... + 392098.

It is an arithmetic number, because the mean of its divisors is an integer number (323295120).

Almost surely, 2^11111111011 is an apocalyptic number.

11111111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11111111011 is a deficient number, since it is larger than the sum of its proper divisors (4407054749).

11111111011 is a wasteful number, since it uses less digits than its factorization.

11111111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29516 (or 29503 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 10.

Adding to 11111111011 its reverse (11011111111), we get a palindrome (22122222122).

It can be divided in two parts, 111111 and 11011, that multiplied together give a palindrome (1223443221).

The spelling of 11111111011 in words is "eleven billion, one hundred eleven million, one hundred eleven thousand, eleven".