21422325343221 has 72 divisors (see below), whose sum is σ = 35277230052792. Its totient is φ = 12507254496000.

The previous prime is 21422325343213. The next prime is 21422325343229. The reversal of 21422325343221 is 12234352322412.

21422325343221 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 2 + 325 + 3 + 4 + 322 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21422325343213) and next prime (21422325343229).

It can be written as a sum of positive squares in 4 ways, for example, as 11162187452196 + 10260137891025 = 3340986^2 + 3203145^2 .

It is not a de Polignac number, because 21422325343221 - 2³ = 21422325343213 is a prime.

It is a super-3 number, since 3×21422325343221³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422325343229) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1437595 + ... + 6701591.

It is an arithmetic number, because the mean of its divisors is an integer number (489961528511).

Almost surely, 2^{21422325343221} is an apocalyptic number.

It is an amenable number.

21422325343221 is a deficient number, since it is larger than the sum of its proper divisors (13854904709571).

21422325343221 is a wasteful number, since it uses less digits than its factorization.

21422325343221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5264163 (or 5264149 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

Adding to 21422325343221 its reverse (12234352322412), we get a palindrome (33656677665633).

The spelling of 21422325343221 in words is "twenty-one trillion, four hundred twenty-two billion, three hundred twenty-five million, three hundred forty-three thousand, two hundred twenty-one".