21301122321 has 6 divisors (see below), whose sum is σ = 30768287810. Its totient is φ = 14200748208.

The previous prime is 21301122313. The next prime is 21301122373. The reversal of 21301122321 is 12322110312.

21301122321 is a `hidden beast` number, since 21 + 301 + 1 + 22 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12377675025 + 8923447296 = 111255^2 + 94464^2 .

It is not a de Polignac number, because 21301122321 - 2³ = 21301122313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21301122294 and 21301122303.

It is not an unprimeable number, because it can be changed into a prime (21301122421) 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 5 ways as a sum of consecutive naturals, for example, 1183395676 + ... + 1183395693.

Almost surely, 2^21301122321 is an apocalyptic number.

It is an amenable number.

21301122321 is a deficient number, since it is larger than the sum of its proper divisors (9467165489).

21301122321 is a wasteful number, since it uses less digits than its factorization.

21301122321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366791375 (or 2366791372 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21301122321 its reverse (12322110312), we get a palindrome (33623232633).

The spelling of 21301122321 in words is "twenty-one billion, three hundred one million, one hundred twenty-two thousand, three hundred twenty-one".