21632213605241 has 4 divisors (see below), whose sum is σ = 21632236124772. Its totient is φ = 21632191085712.

The previous prime is 21632213605229. The next prime is 21632213605309. The reversal of 21632213605241 is 14250631223612.

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 13222648599616 + 8409565005625 = 3636296^2 + 2899925^2 .

It is a cyclic number.

It is not a de Polignac number, because 21632213605241 - 2¹⁴ = 21632213588857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21632213605195 and 21632213605204.

It is not an unprimeable number, because it can be changed into a prime (21632213607241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9751526 + ... + 11762511.

It is an arithmetic number, because the mean of its divisors is an integer number (5408059031193).

Almost surely, 2^{21632213605241} is an apocalyptic number.

It is an amenable number.

21632213605241 is a deficient number, since it is larger than the sum of its proper divisors (22519531).

21632213605241 is a wasteful number, since it uses less digits than its factorization.

21632213605241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22519530.

The product of its (nonzero) digits is 103680, while the sum is 38.

Adding to 21632213605241 its reverse (14250631223612), we get a palindrome (35882844828853).

The spelling of 21632213605241 in words is "twenty-one trillion, six hundred thirty-two billion, two hundred thirteen million, six hundred five thousand, two hundred forty-one".