123230221 has 2 divisors, whose sum is σ = 123230222. Its totient is φ = 123230220.

The previous prime is 123230209. The next prime is 123230231. The reversal of 123230221 is 122032321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 1988100 = 11011^2 + 1410^2 .

It is an emirp because it is prime and its reverse (122032321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123230221 - 2⁵ = 123230189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123230195 and 123230204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123230231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61615110 + 61615111.

It is an arithmetic number, because the mean of its divisors is an integer number (61615111).

Almost surely, 2^123230221 is an apocalyptic number.

It is an amenable number.

123230221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123230221 is an equidigital number, since it uses as much as digits as its factorization.

123230221 is an evil number, because the sum of its binary digits is even.

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

The square root of 123230221 is about 11100.9108184869. The cubic root of 123230221 is about 497.6290698171.

Adding to 123230221 its reverse (122032321), we get a palindrome (245262542).

The spelling of 123230221 in words is "one hundred twenty-three million, two hundred thirty thousand, two hundred twenty-one".