243024121024021 has 2 divisors, whose sum is σ = 243024121024022. Its totient is φ = 243024121024020.

The previous prime is 243024121024007. The next prime is 243024121024079. The reversal of 243024121024021 is 120420121420342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150287028423921 + 92737092600100 = 12259161^2 + 9630010^2 .

It is a cyclic number.

It is not a de Polignac number, because 243024121024021 - 2²³ = 243024112635413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243024121027021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121512060512010 + 121512060512011.

It is an arithmetic number, because the mean of its divisors is an integer number (121512060512011).

Almost surely, 2^{243024121024021} is an apocalyptic number.

It is an amenable number.

243024121024021 is a deficient number, since it is larger than the sum of its proper divisors (1).

243024121024021 is an equidigital number, since it uses as much as digits as its factorization.

243024121024021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 243024121024021 its reverse (120420121420342), we get a palindrome (363444242444363).

The spelling of 243024121024021 in words is "two hundred forty-three trillion, twenty-four billion, one hundred twenty-one million, twenty-four thousand, twenty-one".