121559668 has 12 divisors (see below), whose sum is σ = 215726112. Its totient is φ = 59923640.

The previous prime is 121559653. The next prime is 121559717. The reversal of 121559668 is 866955121.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 213730 + ... + 214297.

It is an arithmetic number, because the mean of its divisors is an integer number (17977176).

Almost surely, 2^121559668 is an apocalyptic number.

It is an amenable number.

121559668 is a deficient number, since it is larger than the sum of its proper divisors (94166444).

121559668 is a wasteful number, since it uses less digits than its factorization.

121559668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428102 (or 428100 counting only the distinct ones).

The product of its digits is 129600, while the sum is 43.

The square root of 121559668 is about 11025.4101057512. The cubic root of 121559668 is about 495.3701520059.

The spelling of 121559668 in words is "one hundred twenty-one million, five hundred fifty-nine thousand, six hundred sixty-eight".