21303003301 has 2 divisors, whose sum is σ = 21303003302. Its totient is φ = 21303003300.

The previous prime is 21303003287. The next prime is 21303003317. The reversal of 21303003301 is 10330030312.

It is an a-pointer prime, because the next prime (21303003317) can be obtained adding 21303003301 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12287500801 + 9015502500 = 110849^2 + 94950^2 .

It is a cyclic number.

It is not a de Polignac number, because 21303003301 - 2⁵ = 21303003269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303003361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651501650 + 10651501651.

It is an arithmetic number, because the mean of its divisors is an integer number (10651501651).

Almost surely, 2^21303003301 is an apocalyptic number.

It is an amenable number.

21303003301 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303003301 is an equidigital number, since it uses as much as digits as its factorization.

21303003301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 21303003301 its reverse (10330030312), we get a palindrome (31633033613).

The spelling of 21303003301 in words is "twenty-one billion, three hundred three million, three thousand, three hundred one".