121556606 has 8 divisors (see below), whose sum is σ = 182637120. Its totient is φ = 60677568.

The previous prime is 121556551. The next prime is 121556621. The reversal of 121556606 is 606655121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 48851 + ... + 51278.

It is an arithmetic number, because the mean of its divisors is an integer number (22829640).

Almost surely, 2^121556606 is an apocalyptic number.

121556606 is a deficient number, since it is larger than the sum of its proper divisors (61080514).

121556606 is a wasteful number, since it uses less digits than its factorization.

121556606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100738.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 121556606 is about 11025.2712438289. The cubic root of 121556606 is about 495.3659926325.

The spelling of 121556606 in words is "one hundred twenty-one million, five hundred fifty-six thousand, six hundred six".