121357280 has 96 divisors (see below), whose sum is σ = 318917088. Its totient is φ = 43264000.

The previous prime is 121357273. The next prime is 121357297. The reversal of 121357280 is 82753121.

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, 92630 + ... + 93930.

It is an arithmetic number, because the mean of its divisors is an integer number (3322053).

Almost surely, 2^121357280 is an apocalyptic number.

121357280 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 121357280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159458544).

121357280 is an abundant number, since it is smaller than the sum of its proper divisors (197559808).

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

121357280 is a wasteful number, since it uses less digits than its factorization.

121357280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 121357280 is about 11016.2280295934. The cubic root of 121357280 is about 495.0950808750.

The spelling of 121357280 in words is "one hundred twenty-one million, three hundred fifty-seven thousand, two hundred eighty".