243232320101 has 2 divisors, whose sum is σ = 243232320102. Its totient is φ = 243232320100.

The previous prime is 243232320091. The next prime is 243232320103. The reversal of 243232320101 is 101023232342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242506017601 + 726302500 = 492449^2 + 26950^2 .

It is a cyclic number.

It is not a de Polignac number, because 243232320101 - 2²² = 243228125797 is a prime.

Together with 243232320103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243232320103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121616160050 + 121616160051.

It is an arithmetic number, because the mean of its divisors is an integer number (121616160051).

Almost surely, 2^243232320101 is an apocalyptic number.

It is an amenable number.

243232320101 is a deficient number, since it is larger than the sum of its proper divisors (1).

243232320101 is an equidigital number, since it uses as much as digits as its factorization.

243232320101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 243232320101 its reverse (101023232342), we get a palindrome (344255552443).

The spelling of 243232320101 in words is "two hundred forty-three billion, two hundred thirty-two million, three hundred twenty thousand, one hundred one".