11211188639 has 16 divisors (see below), whose sum is σ = 12912058368. Its totient is φ = 9535398432.

The previous prime is 11211188629. The next prime is 11211188641. The reversal of 11211188639 is 93688111211.

It is a happy number.

It is not a de Polignac number, because 11211188639 - 2⁴ = 11211188623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211188596 and 11211188605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211188629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517544 + ... + 538770.

It is an arithmetic number, because the mean of its divisors is an integer number (807003648).

Almost surely, 2^11211188639 is an apocalyptic number.

11211188639 is a deficient number, since it is larger than the sum of its proper divisors (1700869729).

11211188639 is a wasteful number, since it uses less digits than its factorization.

11211188639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21814.

The product of its digits is 20736, while the sum is 41.

The spelling of 11211188639 in words is "eleven billion, two hundred eleven million, one hundred eighty-eight thousand, six hundred thirty-nine".