121617207716 has 6 divisors (see below), whose sum is σ = 212830113510. Its totient is φ = 60808603856.

The previous prime is 121617207697. The next prime is 121617207739. The reversal of 121617207716 is 617702716121.

It can be written as a sum of positive squares in only one way, i.e., 103915969600 + 17701238116 = 322360^2 + 133046^2 .

It is an unprimeable number.

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, 15202150961 + ... + 15202150968.

It is an arithmetic number, because the mean of its divisors is an integer number (35471685585).

Almost surely, 2^121617207716 is an apocalyptic number.

It is an amenable number.

121617207716 is a deficient number, since it is larger than the sum of its proper divisors (91212905794).

121617207716 is a wasteful number, since it uses less digits than its factorization.

121617207716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30404301933 (or 30404301931 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 41.

The spelling of 121617207716 in words is "one hundred twenty-one billion, six hundred seventeen million, two hundred seven thousand, seven hundred sixteen".