121266320 has 80 divisors (see below), whose sum is σ = 326229120. Its totient is φ = 41060352.

The previous prime is 121266319. The next prime is 121266323. The reversal of 121266320 is 23662121.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (121266323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45176 + ... + 47784.

It is an arithmetic number, because the mean of its divisors is an integer number (4077864).

Almost surely, 2^121266320 is an apocalyptic number.

121266320 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 121266320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163114560).

121266320 is an abundant number, since it is smaller than the sum of its proper divisors (204962800).

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

121266320 is a wasteful number, since it uses less digits than its factorization.

121266320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712 (or 2706 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 121266320 is about 11012.0988008644. The cubic root of 121266320 is about 494.9713550067.

The spelling of 121266320 in words is "one hundred twenty-one million, two hundred sixty-six thousand, three hundred twenty".