21301023321 has 24 divisors (see below), whose sum is σ = 31912635144. Its totient is φ = 13680057600.

The previous prime is 21301023313. The next prime is 21301023371. The reversal of 21301023321 is 12332010312.

21301023321 is a `hidden beast` number, since 21 + 301 + 0 + 23 + 321 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 18133584921 + 3167438400 = 134661^2 + 56280^2 .

It is not a de Polignac number, because 21301023321 - 2³ = 21301023313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301023294 and 21301023303.

It is not an unprimeable number, because it can be changed into a prime (21301023371) 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 23 ways as a sum of consecutive naturals, for example, 283036 + ... + 350301.

It is an arithmetic number, because the mean of its divisors is an integer number (1329693131).

Almost surely, 2^21301023321 is an apocalyptic number.

It is an amenable number.

21301023321 is a deficient number, since it is larger than the sum of its proper divisors (10611611823).

21301023321 is a wasteful number, since it uses less digits than its factorization.

21301023321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633481 (or 633478 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21301023321 its reverse (12332010312), we get a palindrome (33633033633).

The spelling of 21301023321 in words is "twenty-one billion, three hundred one million, twenty-three thousand, three hundred twenty-one".