243121240244 has 6 divisors (see below), whose sum is σ = 425462170434. Its totient is φ = 121560620120.

The previous prime is 243121240223. The next prime is 243121240249. The reversal of 243121240244 is 442042121342.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 140766035344 + 102355204900 = 375188^2 + 319930^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121240249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30390155027 + ... + 30390155034.

It is an arithmetic number, because the mean of its divisors is an integer number (70910361739).

Almost surely, 2^243121240244 is an apocalyptic number.

It is an amenable number.

243121240244 is a deficient number, since it is larger than the sum of its proper divisors (182340930190).

243121240244 is a wasteful number, since it uses less digits than its factorization.

243121240244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60780310065 (or 60780310063 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 243121240244 its reverse (442042121342), we get a palindrome (685163361586).

The spelling of 243121240244 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty thousand, two hundred forty-four".