11441240721 has 12 divisors (see below), whose sum is σ = 16686686848. Its totient is φ = 7553439864.

The previous prime is 11441240719. The next prime is 11441240803. The reversal of 11441240721 is 12704214411.

It is a happy number.

It is not a de Polignac number, because 11441240721 - 2¹ = 11441240719 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11441240021) 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 11 ways as a sum of consecutive naturals, for example, 6170185 + ... + 6172038.

Almost surely, 2^11441240721 is an apocalyptic number.

It is an amenable number.

11441240721 is a deficient number, since it is larger than the sum of its proper divisors (5245446127).

11441240721 is a wasteful number, since it uses less digits than its factorization.

11441240721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12342332 (or 12342329 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The spelling of 11441240721 in words is "eleven billion, four hundred forty-one million, two hundred forty thousand, seven hundred twenty-one".