21422032441 has 2 divisors, whose sum is σ = 21422032442. Its totient is φ = 21422032440.

The previous prime is 21422032439. The next prime is 21422032451. The reversal of 21422032441 is 14423022412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19872822841 + 1549209600 = 140971^2 + 39360^2 .

It is a cyclic number.

It is not a de Polignac number, because 21422032441 - 2¹ = 21422032439 is a prime.

Together with 21422032439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21422032451) 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 as a sum of consecutive naturals, namely, 10711016220 + 10711016221.

It is an arithmetic number, because the mean of its divisors is an integer number (10711016221).

Almost surely, 2^21422032441 is an apocalyptic number.

It is an amenable number.

21422032441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21422032441 is an equidigital number, since it uses as much as digits as its factorization.

21422032441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21422032441 its reverse (14423022412), we get a palindrome (35845054853).

The spelling of 21422032441 in words is "twenty-one billion, four hundred twenty-two million, thirty-two thousand, four hundred forty-one".