121412280 has 256 divisors, whose sum is σ = 431308800. Its totient is φ = 27025920.

The previous prime is 121412273. The next prime is 121412297. The reversal of 121412280 is 82214121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1178709 + ... + 1178811.

It is an arithmetic number, because the mean of its divisors is an integer number (1684800).

Almost surely, 2^121412280 is an apocalyptic number.

121412280 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 121412280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215654400).

121412280 is an abundant number, since it is smaller than the sum of its proper divisors (309896520).

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

121412280 is a wasteful number, since it uses less digits than its factorization.

121412280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 121412280 is about 11018.7240640648. The cubic root of 121412280 is about 495.1698631400.

The spelling of 121412280 in words is "one hundred twenty-one million, four hundred twelve thousand, two hundred eighty".