243121040412 has 48 divisors (see below), whose sum is σ = 580705910400. Its totient is φ = 79124205888.

The previous prime is 243121040401. The next prime is 243121040413. The reversal of 243121040412 is 214040121342.

It is a super-3 number, since 3×243121040412³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121040413) 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 15 ways as a sum of consecutive naturals, for example, 1222863 + ... + 1407705.

It is an arithmetic number, because the mean of its divisors is an integer number (12098039800).

Almost surely, 2^243121040412 is an apocalyptic number.

It is an amenable number.

243121040412 is an abundant number, since it is smaller than the sum of its proper divisors (337584869988).

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

243121040412 is a wasteful number, since it uses less digits than its factorization.

243121040412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187442 (or 187440 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 243121040412 its reverse (214040121342), we get a palindrome (457161161754).

The spelling of 243121040412 in words is "two hundred forty-three billion, one hundred twenty-one million, forty thousand, four hundred twelve".