243331121000 has 192 divisors, whose sum is σ = 646062842880. Its totient is φ = 85628400000.

The previous prime is 243331120993. The next prime is 243331121003. The reversal of 243331121000 is 121133342.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (243331121003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3718565 + ... + 3783435.

It is an arithmetic number, because the mean of its divisors is an integer number (3364910640).

Almost surely, 2^243331121000 is an apocalyptic number.

243331121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243331121000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323031421440).

243331121000 is an abundant number, since it is smaller than the sum of its proper divisors (402731721880).

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

243331121000 is a wasteful number, since it uses less digits than its factorization.

243331121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64945 (or 64920 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 243331121000 its reverse (121133342), we get a palindrome (243452254342).

The spelling of 243331121000 in words is "two hundred forty-three billion, three hundred thirty-one million, one hundred twenty-one thousand".