11011111011 has 12 divisors (see below), whose sum is σ = 16596457488. Its totient is φ = 7021577904.

The previous prime is 11011111009. The next prime is 11011111031.

11011111011 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11011111011 - 2¹ = 11011111009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

11011111011 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 11011110984 and 11011111002.

It is not an unprimeable number, because it can be changed into a prime (11011111031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26596680 + ... + 26597093.

It is an arithmetic number, because the mean of its divisors is an integer number (1383038124).

Almost surely, 2^11011111011 is an apocalyptic number.

11011111011 is a deficient number, since it is larger than the sum of its proper divisors (5585346477).

11011111011 is a wasteful number, since it uses less digits than its factorization.

11011111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53193802 (or 53193799 counting only the distinct ones).

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

The spelling of 11011111011 in words is "eleven billion, eleven million, one hundred eleven thousand, eleven".