11149667721 has 12 divisors (see below), whose sum is σ = 16378043760. Its totient is φ = 7307126520.

The previous prime is 11149667689. The next prime is 11149667759. The reversal of 11149667721 is 12776694111.

It is not a de Polignac number, because 11149667721 - 2⁵ = 11149667689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11149667021) 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, 10498215 + ... + 10499276.

It is an arithmetic number, because the mean of its divisors is an integer number (1364836980).

Almost surely, 2^11149667721 is an apocalyptic number.

It is an amenable number.

11149667721 is a deficient number, since it is larger than the sum of its proper divisors (5228376039).

11149667721 is a wasteful number, since it uses less digits than its factorization.

11149667721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20997556 (or 20997553 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The spelling of 11149667721 in words is "eleven billion, one hundred forty-nine million, six hundred sixty-seven thousand, seven hundred twenty-one".