121290984 has 48 divisors (see below), whose sum is σ = 345789600. Its totient is φ = 38301984.

The previous prime is 121290979. The next prime is 121290989. The reversal of 121290984 is 489092121.

It is an interprime number because it is at equal distance from previous prime (121290979) and next prime (121290989).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121290989) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 42964 + ... + 45699.

It is an arithmetic number, because the mean of its divisors is an integer number (7203950).

Almost surely, 2^121290984 is an apocalyptic number.

It is an amenable number.

121290984 is an abundant number, since it is smaller than the sum of its proper divisors (224498616).

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

121290984 is a wasteful number, since it uses less digits than its factorization.

121290984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88694 (or 88687 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 121290984 is about 11013.2186031151. The cubic root of 121290984 is about 495.0049096544.

The spelling of 121290984 in words is "one hundred twenty-one million, two hundred ninety thousand, nine hundred eighty-four".