243302011400221 has 2 divisors, whose sum is σ = 243302011400222. Its totient is φ = 243302011400220.

The previous prime is 243302011400213. The next prime is 243302011400263. The reversal of 243302011400221 is 122004110203342.

243302011400221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223042695328996 + 20259316071225 = 14934614^2 + 4501035^2 .

It is a cyclic number.

It is not a de Polignac number, because 243302011400221 - 2³ = 243302011400213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243302011400321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121651005700110 + 121651005700111.

It is an arithmetic number, because the mean of its divisors is an integer number (121651005700111).

Almost surely, 2^{243302011400221} is an apocalyptic number.

It is an amenable number.

243302011400221 is a deficient number, since it is larger than the sum of its proper divisors (1).

243302011400221 is an equidigital number, since it uses as much as digits as its factorization.

243302011400221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243302011400221 its reverse (122004110203342), we get a palindrome (365306121603563).

The spelling of 243302011400221 in words is "two hundred forty-three trillion, three hundred two billion, eleven million, four hundred thousand, two hundred twenty-one".