121868280 has 128 divisors (see below), whose sum is σ = 427680000. Its totient is φ = 30782592.

The previous prime is 121868249. The next prime is 121868297. The reversal of 121868280 is 82868121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17551 + ... + 23489.

It is an arithmetic number, because the mean of its divisors is an integer number (3341250).

Almost surely, 2^121868280 is an apocalyptic number.

121868280 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 121868280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213840000).

121868280 is an abundant number, since it is smaller than the sum of its proper divisors (305811720).

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

121868280 is a wasteful number, since it uses less digits than its factorization.

121868280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978 (or 5968 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 121868280 is about 11039.3967226475. The cubic root of 121868280 is about 495.7890079875.

The spelling of 121868280 in words is "one hundred twenty-one million, eight hundred sixty-eight thousand, two hundred eighty".