21324323101 has 2 divisors, whose sum is σ = 21324323102. Its totient is φ = 21324323100.

The previous prime is 21324323071. The next prime is 21324323129. The reversal of 21324323101 is 10132342312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13253995876 + 8070327225 = 115126^2 + 89835^2 .

It is a cyclic number.

It is not a de Polignac number, because 21324323101 - 2⁷ = 21324322973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21324323171) 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, 10662161550 + 10662161551.

It is an arithmetic number, because the mean of its divisors is an integer number (10662161551).

Almost surely, 2^21324323101 is an apocalyptic number.

It is an amenable number.

21324323101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21324323101 is an equidigital number, since it uses as much as digits as its factorization.

21324323101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21324323101 its reverse (10132342312), we get a palindrome (31456665413).

The spelling of 21324323101 in words is "twenty-one billion, three hundred twenty-four million, three hundred twenty-three thousand, one hundred one".