121384780 has 36 divisors (see below), whose sum is σ = 280193760. Its totient is φ = 44139040.

The previous prime is 121384763. The next prime is 121384789. The reversal of 121384780 is 87483121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121384789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22660 + ... + 27499.

It is an arithmetic number, because the mean of its divisors is an integer number (7783160).

Almost surely, 2^121384780 is an apocalyptic number.

121384780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121384780 is an abundant number, since it is smaller than the sum of its proper divisors (158808980).

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

121384780 is a wasteful number, since it uses less digits than its factorization.

121384780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50190 (or 50177 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 121384780 is about 11017.4761175144. The cubic root of 121384780 is about 495.1324748312.

The spelling of 121384780 in words is "one hundred twenty-one million, three hundred eighty-four thousand, seven hundred eighty".