121644320 has 96 divisors (see below), whose sum is σ = 330438528. Its totient is φ = 41453568.

The previous prime is 121644317. The next prime is 121644337. The reversal of 121644320 is 23446121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350387 + ... + 350733.

It is an arithmetic number, because the mean of its divisors is an integer number (3442068).

Almost surely, 2^121644320 is an apocalyptic number.

121644320 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 121644320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165219264).

121644320 is an abundant number, since it is smaller than the sum of its proper divisors (208794208).

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

121644320 is a wasteful number, since it uses less digits than its factorization.

121644320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 121644320 is about 11029.2483878096. The cubic root of 121644320 is about 495.4851143244.

The spelling of 121644320 in words is "one hundred twenty-one million, six hundred forty-four thousand, three hundred twenty".