243102112321 has 2 divisors, whose sum is σ = 243102112322. Its totient is φ = 243102112320.

The previous prime is 243102112303. The next prime is 243102112447. The reversal of 243102112321 is 123211201342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152540238096 + 90561874225 = 390564^2 + 300935^2 .

It is a cyclic number.

It is not a de Polignac number, because 243102112321 - 2⁷ = 243102112193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243102112292 and 243102112301.

It is not a weakly prime, because it can be changed into another prime (243102512321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121551056160 + 121551056161.

It is an arithmetic number, because the mean of its divisors is an integer number (121551056161).

Almost surely, 2^243102112321 is an apocalyptic number.

It is an amenable number.

243102112321 is a deficient number, since it is larger than the sum of its proper divisors (1).

243102112321 is an equidigital number, since it uses as much as digits as its factorization.

243102112321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 243102112321 its reverse (123211201342), we get a palindrome (366313313663).

The spelling of 243102112321 in words is "two hundred forty-three billion, one hundred two million, one hundred twelve thousand, three hundred twenty-one".