11628844040221 has 4 divisors (see below), whose sum is σ = 11660020566172. Its totient is φ = 11597667514272.

The previous prime is 11628844040189. The next prime is 11628844040243. The reversal of 11628844040221 is 12204044882611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7409882852100 + 4218961188121 = 2722110^2 + 2054011^2 .

It is a cyclic number.

It is not a de Polignac number, because 11628844040221 - 2⁵ = 11628844040189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11628844040621) 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 3 ways as a sum of consecutive naturals, for example, 15588262416 + ... + 15588263161.

It is an arithmetic number, because the mean of its divisors is an integer number (2915005141543).

Almost surely, 2^{11628844040221} is an apocalyptic number.

It is an amenable number.

11628844040221 is a deficient number, since it is larger than the sum of its proper divisors (31176525951).

11628844040221 is an equidigital number, since it uses as much as digits as its factorization.

11628844040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31176525950.

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 11628844040221 in words is "eleven trillion, six hundred twenty-eight billion, eight hundred forty-four million, forty thousand, two hundred twenty-one".