11181021696 has 120 divisors (see below), whose sum is σ = 34751616900. Its totient is φ = 3440295936.

The previous prime is 11181021617. The next prime is 11181021757. The reversal of 11181021696 is 69612018111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10799366400 + 381655296 = 103920^2 + 19536^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11181021696.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33421 + ... + 153228.

Almost surely, 2^11181021696 is an apocalyptic number.

11181021696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11181021696 is an abundant number, since it is smaller than the sum of its proper divisors (23570595204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11181021696 is a wasteful number, since it uses less digits than its factorization.

11181021696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186686 (or 186667 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The spelling of 11181021696 in words is "eleven billion, one hundred eighty-one million, twenty-one thousand, six hundred ninety-six".