243120210120 has 96 divisors (see below), whose sum is σ = 790217995320. Its totient is φ = 64825712640.

The previous prime is 243120210097. The next prime is 243120210121. The reversal of 243120210120 is 21012021342.

It is a happy number.

243120210120 is a `hidden beast` number, since 2 + 431 + 2 + 0 + 210 + 1 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 161522002404 + 81598207716 = 401898^2 + 285654^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 243120210093 and 243120210102.

It is not an unprimeable number, because it can be changed into a prime (243120210121) 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 23 ways as a sum of consecutive naturals, for example, 4522600 + ... + 4576040.

Almost surely, 2^243120210120 is an apocalyptic number.

243120210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243120210120 is an abundant number, since it is smaller than the sum of its proper divisors (547097785200).

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

243120210120 is a wasteful number, since it uses less digits than its factorization.

243120210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66095 (or 66088 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 243120210120 its reverse (21012021342), we get a palindrome (264132231462).

The spelling of 243120210120 in words is "two hundred forty-three billion, one hundred twenty million, two hundred ten thousand, one hundred twenty".