230210021 has 2 divisors, whose sum is σ = 230210022. Its totient is φ = 230210020.

The previous prime is 230209997. The next prime is 230210051. The reversal of 230210021 is 120012032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226653025 + 3556996 = 15055^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 230210021 - 2²² = 226015717 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 230209984 and 230210011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230210051) 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, 115105010 + 115105011.

It is an arithmetic number, because the mean of its divisors is an integer number (115105011).

Almost surely, 2^230210021 is an apocalyptic number.

It is an amenable number.

230210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

230210021 is an equidigital number, since it uses as much as digits as its factorization.

230210021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 230210021 is about 15172.6734954655. The cubic root of 230210021 is about 612.8790010862.

Adding to 230210021 its reverse (120012032), we get a palindrome (350222053).

The spelling of 230210021 in words is "two hundred thirty million, two hundred ten thousand, twenty-one".