121201020120289 has 2 divisors, whose sum is σ = 121201020120290. Its totient is φ = 121201020120288.

The previous prime is 121201020120199. The next prime is 121201020120317. The reversal of 121201020120289 is 982021020102121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73639859588689 + 47561160531600 = 8581367^2 + 6896460^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201020120289 - 2⁴³ = 112404927098081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121201020120289.

It is not a weakly prime, because it can be changed into another prime (121201020129289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600510060144 + 60600510060145.

It is an arithmetic number, because the mean of its divisors is an integer number (60600510060145).

Almost surely, 2^{121201020120289} is an apocalyptic number.

It is an amenable number.

121201020120289 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201020120289 is an equidigital number, since it uses as much as digits as its factorization.

121201020120289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 121201020120289 in words is "one hundred twenty-one trillion, two hundred one billion, twenty million, one hundred twenty thousand, two hundred eighty-nine".