243320122109 has 2 divisors, whose sum is σ = 243320122110. Its totient is φ = 243320122108.

The previous prime is 243320122093. The next prime is 243320122139. The reversal of 243320122109 is 901221023342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234343128100 + 8976994009 = 484090^2 + 94747^2 .

It is a cyclic number.

It is not a de Polignac number, because 243320122109 - 2⁴ = 243320122093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243320122139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121660061054 + 121660061055.

It is an arithmetic number, because the mean of its divisors is an integer number (121660061055).

Almost surely, 2^243320122109 is an apocalyptic number.

It is an amenable number.

243320122109 is a deficient number, since it is larger than the sum of its proper divisors (1).

243320122109 is an equidigital number, since it uses as much as digits as its factorization.

243320122109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 243320122109 in words is "two hundred forty-three billion, three hundred twenty million, one hundred twenty-two thousand, one hundred nine".