121559645201 has 2 divisors, whose sum is σ = 121559645202. Its totient is φ = 121559645200.

The previous prime is 121559645191. The next prime is 121559645267. The reversal of 121559645201 is 102546955121.

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., 88152579025 + 33407066176 = 296905^2 + 182776^2 .

It is a cyclic number.

It is not a de Polignac number, because 121559645201 - 2¹⁰ = 121559644177 is a prime.

It is not a weakly prime, because it can be changed into another prime (121559647201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60779822600 + 60779822601.

It is an arithmetic number, because the mean of its divisors is an integer number (60779822601).

Almost surely, 2^121559645201 is an apocalyptic number.

It is an amenable number.

121559645201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121559645201 is an equidigital number, since it uses as much as digits as its factorization.

121559645201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 121559645201 in words is "one hundred twenty-one billion, five hundred fifty-nine million, six hundred forty-five thousand, two hundred one".