121532224 has 56 divisors (see below), whose sum is σ = 268760448. Its totient is φ = 54051840.

The previous prime is 121532221. The next prime is 121532251. The reversal of 121532224 is 422235121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 121532195 and 121532204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121532221) 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, 31252 + ... + 34924.

Almost surely, 2^121532224 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 121532224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134380224).

121532224 is an abundant number, since it is smaller than the sum of its proper divisors (147228224).

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

121532224 is a wasteful number, since it uses less digits than its factorization.

121532224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743 (or 3733 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 121532224 is about 11024.1654559427. The cubic root of 121532224 is about 495.3328700085.

Adding to 121532224 its reverse (422235121), we get a palindrome (543767345).

The spelling of 121532224 in words is "one hundred twenty-one million, five hundred thirty-two thousand, two hundred twenty-four".