121530613663161 has 24 divisors (see below), whose sum is σ = 181313592262400. Its totient is φ = 78360698397600.

The previous prime is 121530613663157. The next prime is 121530613663183. The reversal of 121530613663161 is 161366316035121.

121530613663161 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 3 + 0 + 6 + 1 + 3 + 6 + 631 + 6 + 1 = 666.

It is not a de Polignac number, because 121530613663161 - 2² = 121530613663157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121530613643161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127717150 + ... + 128665191.

Almost surely, 2^{121530613663161} is an apocalyptic number.

It is an amenable number.

121530613663161 is a deficient number, since it is larger than the sum of its proper divisors (59782978599239).

121530613663161 is a wasteful number, since it uses less digits than its factorization.

121530613663161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256384077 (or 256384074 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

Adding to 121530613663161 its reverse (161366316035121), we get a palindrome (282896929698282).

The spelling of 121530613663161 in words is "one hundred twenty-one trillion, five hundred thirty billion, six hundred thirteen million, six hundred sixty-three thousand, one hundred sixty-one".