121632224 has 48 divisors (see below), whose sum is σ = 288086400. Its totient is φ = 49382784.

The previous prime is 121632169. The next prime is 121632227. The reversal of 121632224 is 422236121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121632224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121632227) 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, 10034 + ... + 18545.

It is an arithmetic number, because the mean of its divisors is an integer number (6001800).

Almost surely, 2^121632224 is an apocalyptic number.

121632224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121632224 is an abundant number, since it is smaller than the sum of its proper divisors (166454176).

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

121632224 is a wasteful number, since it uses less digits than its factorization.

121632224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28615 (or 28607 counting only the distinct ones).

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

The square root of 121632224 is about 11028.7000140542. The cubic root of 121632224 is about 495.4686905226.

Adding to 121632224 its reverse (422236121), we get a palindrome (543868345).

The spelling of 121632224 in words is "one hundred twenty-one million, six hundred thirty-two thousand, two hundred twenty-four".