8389865350121 has 2 divisors, whose sum is σ = 8389865350122. Its totient is φ = 8389865350120.

The previous prime is 8389865350079. The next prime is 8389865350123. The reversal of 8389865350121 is 1210535689838.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8154023025625 + 235842324496 = 2855525^2 + 485636^2 .

It is a cyclic number.

It is not a de Polignac number, because 8389865350121 - 2¹⁴ = 8389865333737 is a prime.

Together with 8389865350123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8389865350123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4194932675060 + 4194932675061.

It is an arithmetic number, because the mean of its divisors is an integer number (4194932675061).

Almost surely, 2^{8389865350121} is an apocalyptic number.

It is an amenable number.

8389865350121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8389865350121 is an equidigital number, since it uses as much as digits as its factorization.

8389865350121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12441600, while the sum is 59.

The spelling of 8389865350121 in words is "eight trillion, three hundred eighty-nine billion, eight hundred sixty-five million, three hundred fifty thousand, one hundred twenty-one".