21323303101 has 2 divisors, whose sum is σ = 21323303102. Its totient is φ = 21323303100.

The previous prime is 21323303041. The next prime is 21323303129. The reversal of 21323303101 is 10130332312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18468538201 + 2854764900 = 135899^2 + 53430^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323303101 - 2¹¹ = 21323301053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21323303401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661651550 + 10661651551.

It is an arithmetic number, because the mean of its divisors is an integer number (10661651551).

Almost surely, 2^21323303101 is an apocalyptic number.

It is an amenable number.

21323303101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323303101 is an equidigital number, since it uses as much as digits as its factorization.

21323303101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21323303101 its reverse (10130332312), we get a palindrome (31453635413).

The spelling of 21323303101 in words is "twenty-one billion, three hundred twenty-three million, three hundred three thousand, one hundred one".