121878680 has 96 divisors (see below), whose sum is σ = 348060240. Its totient is φ = 37981440.

The previous prime is 121878667. The next prime is 121878689. The reversal of 121878680 is 86878121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121878689) 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 23 ways as a sum of consecutive naturals, for example, 18734 + ... + 24386.

Almost surely, 2^121878680 is an apocalyptic number.

121878680 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 121878680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174030120).

121878680 is an abundant number, since it is smaller than the sum of its proper divisors (226181560).

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

121878680 is a wasteful number, since it uses less digits than its factorization.

121878680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5678 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 41.

The square root of 121878680 is about 11039.8677528311. The cubic root of 121878680 is about 495.8031108069.

The spelling of 121878680 in words is "one hundred twenty-one million, eight hundred seventy-eight thousand, six hundred eighty".