121323280 has 40 divisors (see below), whose sum is σ = 303777432. Its totient is φ = 44795904.

The previous prime is 121323263. The next prime is 121323283. The reversal of 121323280 is 82323121.

121323280 = T₂₈₅ + T₂₈₆ + ... + T₉₀₈.

It can be written as a sum of positive squares in 4 ways, for example, as 7772944 + 113550336 = 2788^2 + 10656^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (121323283) 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, 57289 + ... + 59368.

Almost surely, 2^121323280 is an apocalyptic number.

121323280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121323280 is an abundant number, since it is smaller than the sum of its proper divisors (182454152).

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

121323280 is a wasteful number, since it uses less digits than its factorization.

121323280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116683 (or 116677 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 121323280 is about 11014.6847435594. The cubic root of 121323280 is about 495.0488405368.

The spelling of 121323280 in words is "one hundred twenty-one million, three hundred twenty-three thousand, two hundred eighty".