121816465868 has 6 divisors (see below), whose sum is σ = 213178815276. Its totient is φ = 60908232932.

The previous prime is 121816465847. The next prime is 121816465891. The reversal of 121816465868 is 868564618121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15227058230 + ... + 15227058237.

It is an arithmetic number, because the mean of its divisors is an integer number (35529802546).

Almost surely, 2^121816465868 is an apocalyptic number.

It is an amenable number.

121816465868 is a deficient number, since it is larger than the sum of its proper divisors (91362349408).

121816465868 is a wasteful number, since it uses less digits than its factorization.

121816465868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30454116471 (or 30454116469 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 56.

The spelling of 121816465868 in words is "one hundred twenty-one billion, eight hundred sixteen million, four hundred sixty-five thousand, eight hundred sixty-eight".