121616587386366 has 16 divisors (see below), whose sum is σ = 243341809536000. Its totient is φ = 40520756668248.

The previous prime is 121616587386323. The next prime is 121616587386397. The reversal of 121616587386366 is 663683785616121.

It is a self number, because there is not a number n which added to its sum of digits gives 121616587386366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4526433916 + ... + 4526460783.

It is an arithmetic number, because the mean of its divisors is an integer number (15208863096000).

Almost surely, 2^{121616587386366} is an apocalyptic number.

121616587386366 is an abundant number, since it is smaller than the sum of its proper divisors (121725222149634).

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

121616587386366 is a wasteful number, since it uses less digits than its factorization.

121616587386366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052896943.

The product of its digits is 313528320, while the sum is 69.

The spelling of 121616587386366 in words is "one hundred twenty-one trillion, six hundred sixteen billion, five hundred eighty-seven million, three hundred eighty-six thousand, three hundred sixty-six".