121680059972 has 6 divisors (see below), whose sum is σ = 212940104958. Its totient is φ = 60840029984.

The previous prime is 121680059971. The next prime is 121680059987. The reversal of 121680059972 is 279950086121.

It can be written as a sum of positive squares in only one way, i.e., 64102137856 + 57577922116 = 253184^2 + 239954^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121680059972.

It is not an unprimeable number, because it can be changed into a prime (121680059971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210007493 + ... + 15210007500.

It is an arithmetic number, because the mean of its divisors is an integer number (35490017493).

Almost surely, 2^121680059972 is an apocalyptic number.

It is an amenable number.

121680059972 is a deficient number, since it is larger than the sum of its proper divisors (91260044986).

121680059972 is a wasteful number, since it uses less digits than its factorization.

121680059972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30420014997 (or 30420014995 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 121680059972 in words is "one hundred twenty-one billion, six hundred eighty million, fifty-nine thousand, nine hundred seventy-two".