11550651021 has 24 divisors (see below), whose sum is σ = 20534492160. Its totient is φ = 6092650656.

The previous prime is 11550651017. The next prime is 11550651031. The reversal of 11550651021 is 12015605511.

11550651021 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 0 + 651 + 0 + 2 + 1 = 666.

11550651021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11550651021 - 2² = 11550651017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11550651001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7050861 + ... + 7052498.

It is an arithmetic number, because the mean of its divisors is an integer number (855603840).

Almost surely, 2^11550651021 is an apocalyptic number.

It is an amenable number.

11550651021 is a deficient number, since it is larger than the sum of its proper divisors (8983841139).

11550651021 is a wasteful number, since it uses less digits than its factorization.

11550651021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14103385 (or 14103382 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

The spelling of 11550651021 in words is "eleven billion, five hundred fifty million, six hundred fifty-one thousand, twenty-one".