121815232 has 112 divisors (see below), whose sum is σ = 317479680. Its totient is φ = 44928000.

The previous prime is 121815229. The next prime is 121815233. The reversal of 121815232 is 232518121.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 121815197 and 121815206.

It is not an unprimeable number, because it can be changed into a prime (121815233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92982 + ... + 94282.

It is an arithmetic number, because the mean of its divisors is an integer number (2834640).

Almost surely, 2^121815232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121815232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158739840).

121815232 is an abundant number, since it is smaller than the sum of its proper divisors (195664448).

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

121815232 is a wasteful number, since it uses less digits than its factorization.

121815232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350 (or 1340 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 121815232 is about 11036.9937936016. The cubic root of 121815232 is about 495.7170602738.

The spelling of 121815232 in words is "one hundred twenty-one million, eight hundred fifteen thousand, two hundred thirty-two".