1232030021 has 2 divisors, whose sum is σ = 1232030022. Its totient is φ = 1232030020.

The previous prime is 1232029949. The next prime is 1232030027. The reversal of 1232030021 is 1200302321.

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., 1231237921 + 792100 = 35089^2 + 890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232030021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1232029978 and 1232030005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232030027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616015010 + 616015011.

It is an arithmetic number, because the mean of its divisors is an integer number (616015011).

Almost surely, 2^1232030021 is an apocalyptic number.

It is an amenable number.

1232030021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232030021 is an equidigital number, since it uses as much as digits as its factorization.

1232030021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1232030021 is about 35100.2851982715. The cubic root of 1232030021 is about 1072.0303896881.

Adding to 1232030021 its reverse (1200302321), we get a palindrome (2432332342).

The spelling of 1232030021 in words is "one billion, two hundred thirty-two million, thirty thousand, twenty-one".