121281270 has 32 divisors (see below), whose sum is σ = 317537280. Its totient is φ = 29401440.

The previous prime is 121281229. The next prime is 121281283. The reversal of 121281270 is 72182121.

It is a self number, because there is not a number n which added to its sum of digits gives 121281270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183430 + ... + 184089.

It is an arithmetic number, because the mean of its divisors is an integer number (9923040).

Almost surely, 2^121281270 is an apocalyptic number.

121281270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121281270 is an abundant number, since it is smaller than the sum of its proper divisors (196256010).

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

121281270 is a wasteful number, since it uses less digits than its factorization.

121281270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367540.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 121281270 is about 11012.7775787946. Note that the first 3 decimals coincide. The cubic root of 121281270 is about 494.9916945857.

The spelling of 121281270 in words is "one hundred twenty-one million, two hundred eighty-one thousand, two hundred seventy".