243320011242137 has 2 divisors, whose sum is σ = 243320011242138. Its totient is φ = 243320011242136.

The previous prime is 243320011242127. The next prime is 243320011242199. The reversal of 243320011242137 is 731242110023342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189066460020736 + 54253551221401 = 13750144^2 + 7365701^2 .

It is a cyclic number.

It is not a de Polignac number, because 243320011242137 - 2¹⁸ = 243320010979993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243320011242097 and 243320011242106.

It is not a weakly prime, because it can be changed into another prime (243320011242127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121660005621068 + 121660005621069.

It is an arithmetic number, because the mean of its divisors is an integer number (121660005621069).

Almost surely, 2^{243320011242137} is an apocalyptic number.

It is an amenable number.

243320011242137 is a deficient number, since it is larger than the sum of its proper divisors (1).

243320011242137 is an equidigital number, since it uses as much as digits as its factorization.

243320011242137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

Adding to 243320011242137 its reverse (731242110023342), we get a palindrome (974562121265479).

The spelling of 243320011242137 in words is "two hundred forty-three trillion, three hundred twenty billion, eleven million, two hundred forty-two thousand, one hundred thirty-seven".