121656704066716 has 96 divisors (see below), whose sum is σ = 275825408463360. Its totient is φ = 45594127459584.

The previous prime is 121656704066713. The next prime is 121656704066731. The reversal of 121656704066716 is 617660407656121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121656704066713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 599467335 + ... + 599670241.

It is an arithmetic number, because the mean of its divisors is an integer number (2873181338160).

Almost surely, 2^{121656704066716} is an apocalyptic number.

It is an amenable number.

121656704066716 is an abundant number, since it is smaller than the sum of its proper divisors (154168704396644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121656704066716 is a wasteful number, since it uses less digits than its factorization.

121656704066716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289643 (or 289641 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 121656704066716 in words is "one hundred twenty-one trillion, six hundred fifty-six billion, seven hundred four million, sixty-six thousand, seven hundred sixteen".