121780424 has 16 divisors (see below), whose sum is σ = 240356400. Its totient is φ = 57685392.

The previous prime is 121780403. The next prime is 121780441. The reversal of 121780424 is 424087121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400442 + ... + 400745.

It is an arithmetic number, because the mean of its divisors is an integer number (15022275).

Almost surely, 2^121780424 is an apocalyptic number.

It is an amenable number.

121780424 is a deficient number, since it is larger than the sum of its proper divisors (118575976).

121780424 is a wasteful number, since it uses less digits than its factorization.

121780424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801212 (or 801208 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 121780424 is about 11035.4168022780. The cubic root of 121780424 is about 495.6698396789.

The spelling of 121780424 in words is "one hundred twenty-one million, seven hundred eighty thousand, four hundred twenty-four".