243223124321 has 2 divisors, whose sum is σ = 243223124322. Its totient is φ = 243223124320.

The previous prime is 243223124269. The next prime is 243223124329. The reversal of 243223124321 is 123421322342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239448742225 + 3774382096 = 489335^2 + 61436^2 .

It is a cyclic number.

It is not a de Polignac number, because 243223124321 - 2²⁶ = 243156015457 is a prime.

It is a super-2 number, since 2×243223124321² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243223124329) 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, 121611562160 + 121611562161.

It is an arithmetic number, because the mean of its divisors is an integer number (121611562161).

Almost surely, 2^243223124321 is an apocalyptic number.

It is an amenable number.

243223124321 is a deficient number, since it is larger than the sum of its proper divisors (1).

243223124321 is an equidigital number, since it uses as much as digits as its factorization.

243223124321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

Adding to 243223124321 its reverse (123421322342), we get a palindrome (366644446663).

The spelling of 243223124321 in words is "two hundred forty-three billion, two hundred twenty-three million, one hundred twenty-four thousand, three hundred twenty-one".