121200438 has 16 divisors (see below), whose sum is σ = 242542080. Its totient is φ = 40376616.

The previous prime is 121200413. The next prime is 121200439. The reversal of 121200438 is 834002121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7683 + ... + 17361.

It is an arithmetic number, because the mean of its divisors is an integer number (15158880).

Almost surely, 2^121200438 is an apocalyptic number.

121200438 is an abundant number, since it is smaller than the sum of its proper divisors (121341642).

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

121200438 is a wasteful number, since it uses less digits than its factorization.

121200438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11771.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 121200438 is about 11009.1070482578. The cubic root of 121200438 is about 494.8817021665.

Adding to 121200438 its reverse (834002121), we get a palindrome (955202559).

The spelling of 121200438 in words is "one hundred twenty-one million, two hundred thousand, four hundred thirty-eight".