121205568 has 56 divisors (see below), whose sum is σ = 349849440. Its totient is φ = 36728320.

The previous prime is 121205551. The next prime is 121205573. The reversal of 121205568 is 865502121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26583 + ... + 30806.

Almost surely, 2^121205568 is an apocalyptic number.

It is an amenable number.

121205568 is an abundant number, since it is smaller than the sum of its proper divisors (228643872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121205568 is a wasteful number, since it uses less digits than its factorization.

121205568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57415 (or 57405 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 121205568 is about 11009.3400347160. The cubic root of 121205568 is about 494.8886842845. Note that the first 3 decimals are identical.

Adding to 121205568 its reverse (865502121), we get a palindrome (986707689).

The spelling of 121205568 in words is "one hundred twenty-one million, two hundred five thousand, five hundred sixty-eight".