121680059987 has 2 divisors, whose sum is σ = 121680059988. Its totient is φ = 121680059986.

The previous prime is 121680059971. The next prime is 121680060011. The reversal of 121680059987 is 789950086121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121680059987 - 2⁴ = 121680059971 is a prime.

It is not a weakly prime, because it can be changed into another prime (121680059927) by changing a digit.

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, 60840029993 + 60840029994.

It is an arithmetic number, because the mean of its divisors is an integer number (60840029994).

Almost surely, 2^121680059987 is an apocalyptic number.

121680059987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121680059987 is an equidigital number, since it uses as much as digits as its factorization.

121680059987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 121680059987 in words is "one hundred twenty-one billion, six hundred eighty million, fifty-nine thousand, nine hundred eighty-seven".