121556650 has 24 divisors (see below), whose sum is σ = 226860480. Its totient is φ = 48458160.

The previous prime is 121556641. The next prime is 121556651. The reversal of 121556650 is 56655121.

It is not an unprimeable number, because it can be changed into a prime (121556651) 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 in 11 ways as a sum of consecutive naturals, for example, 11391 + ... + 19309.

It is an arithmetic number, because the mean of its divisors is an integer number (9452520).

Almost surely, 2^121556650 is an apocalyptic number.

121556650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121556650 is a deficient number, since it is larger than the sum of its proper divisors (105303830).

121556650 is a wasteful number, since it uses less digits than its factorization.

121556650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8238 (or 8233 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 121556650 is about 11025.2732392445. The cubic root of 121556650 is about 495.3660524019.

The spelling of 121556650 in words is "one hundred twenty-one million, five hundred fifty-six thousand, six hundred fifty".