21230304001 has 2 divisors, whose sum is σ = 21230304002. Its totient is φ = 21230304000.

The previous prime is 21230303981. The next prime is 21230304019. The reversal of 21230304001 is 10040303212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20757893776 + 472410225 = 144076^2 + 21735^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230304001 - 2⁷ = 21230303873 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230302001) 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 as a sum of consecutive naturals, namely, 10615152000 + 10615152001.

It is an arithmetic number, because the mean of its divisors is an integer number (10615152001).

Almost surely, 2^21230304001 is an apocalyptic number.

It is an amenable number.

21230304001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230304001 is an equidigital number, since it uses as much as digits as its factorization.

21230304001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21230304001 its reverse (10040303212), we get a palindrome (31270607213).

The spelling of 21230304001 in words is "twenty-one billion, two hundred thirty million, three hundred four thousand, one".