121330280 has 32 divisors (see below), whose sum is σ = 281802240. Its totient is φ = 46966080.

The previous prime is 121330277. The next prime is 121330283. The reversal of 121330280 is 82033121.

It is an interprime number because it is at equal distance from previous prime (121330277) and next prime (121330283).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (121330283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47684 + ... + 50163.

It is an arithmetic number, because the mean of its divisors is an integer number (8806320).

Almost surely, 2^121330280 is an apocalyptic number.

121330280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121330280 is an abundant number, since it is smaller than the sum of its proper divisors (160471960).

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

121330280 is a wasteful number, since it uses less digits than its factorization.

121330280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97889 (or 97885 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 121330280 is about 11015.0024965953. The cubic root of 121330280 is about 495.0583613126.

The spelling of 121330280 in words is "one hundred twenty-one million, three hundred thirty thousand, two hundred eighty".