121805788 has 12 divisors (see below), whose sum is σ = 229557160. Its totient is φ = 56218032.

The previous prime is 121805773. The next prime is 121805791. The reversal of 121805788 is 887508121.

It is a self number, because there is not a number n which added to its sum of digits gives 121805788.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1171158 + ... + 1171261.

Almost surely, 2^121805788 is an apocalyptic number.

It is an amenable number.

121805788 is a deficient number, since it is larger than the sum of its proper divisors (107751372).

121805788 is a wasteful number, since it uses less digits than its factorization.

121805788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342436 (or 2342434 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 121805788 is about 11036.5659514180. The cubic root of 121805788 is about 495.7042494159.

The spelling of 121805788 in words is "one hundred twenty-one million, eight hundred five thousand, seven hundred eighty-eight".