121232400 has 60 divisors (see below), whose sum is σ = 388351632. Its totient is φ = 32328320.

The previous prime is 121232393. The next prime is 121232401. The reversal of 121232400 is 4232121.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121232400.

It is not an unprimeable number, because it can be changed into a prime (121232401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49314 + ... + 51713.

Almost surely, 2^121232400 is an apocalyptic number.

121232400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232400 is an abundant number, since it is smaller than the sum of its proper divisors (267119232).

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

121232400 is a wasteful number, since it uses less digits than its factorization.

121232400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101048 (or 101037 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 121232400 is about 11010.5585689374. The cubic root of 121232400 is about 494.9252004107.

Adding to 121232400 its reverse (4232121), we get a palindrome (125464521).

The spelling of 121232400 in words is "one hundred twenty-one million, two hundred thirty-two thousand, four hundred".