11388944961011 has 4 divisors (see below), whose sum is σ = 12058882899912. Its totient is φ = 10719007022112.

The previous prime is 11388944961007. The next prime is 11388944961041. The reversal of 11388944961011 is 11016944988311.

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 11388944961011 - 2² = 11388944961007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11388944961001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334968969425 + ... + 334968969458.

It is an arithmetic number, because the mean of its divisors is an integer number (3014720724978).

Almost surely, 2^{11388944961011} is an apocalyptic number.

11388944961011 is a deficient number, since it is larger than the sum of its proper divisors (669937938901).

11388944961011 is an equidigital number, since it uses as much as digits as its factorization.

11388944961011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669937938900.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 11388944961011 in words is "eleven trillion, three hundred eighty-eight billion, nine hundred forty-four million, nine hundred sixty-one thousand, eleven".