121284980 has 48 divisors (see below), whose sum is σ = 279780480. Its totient is φ = 43959168.

The previous prime is 121284979. The next prime is 121285033. The reversal of 121284980 is 89482121.

It is a self number, because there is not a number n which added to its sum of digits gives 121284980.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1802 + ... + 15678.

It is an arithmetic number, because the mean of its divisors is an integer number (5828760).

Almost surely, 2^121284980 is an apocalyptic number.

121284980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121284980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139890240).

121284980 is an abundant number, since it is smaller than the sum of its proper divisors (158495500).

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

121284980 is a wasteful number, since it uses less digits than its factorization.

121284980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13928 (or 13926 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 121284980 is about 11012.9460182097. The cubic root of 121284980 is about 494.9967418076.

The spelling of 121284980 in words is "one hundred twenty-one million, two hundred eighty-four thousand, nine hundred eighty".