1230304021 has 2 divisors, whose sum is σ = 1230304022. Its totient is φ = 1230304020.

The previous prime is 1230304013. The next prime is 1230304027. The reversal of 1230304021 is 1204030321.

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., 750212100 + 480091921 = 27390^2 + 21911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230304021 - 2³ = 1230304013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230303986 and 1230304004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230304027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615152010 + 615152011.

It is an arithmetic number, because the mean of its divisors is an integer number (615152011).

Almost surely, 2^1230304021 is an apocalyptic number.

It is an amenable number.

1230304021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230304021 is an equidigital number, since it uses as much as digits as its factorization.

1230304021 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.

The square root of 1230304021 is about 35075.6898863016. The cubic root of 1230304021 is about 1071.5295390165.

Adding to 1230304021 its reverse (1204030321), we get a palindrome (2434334342).

The spelling of 1230304021 in words is "one billion, two hundred thirty million, three hundred four thousand, twenty-one".