243113321201 has 4 divisors (see below), whose sum is σ = 243427828212. Its totient is φ = 242798814192.

The previous prime is 243113321189. The next prime is 243113321207. The reversal of 243113321201 is 102123311342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25607680576 + 217505640625 = 160024^2 + 466375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243113321201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243113321207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157252346 + ... + 157253891.

It is an arithmetic number, because the mean of its divisors is an integer number (60856957053).

Almost surely, 2^243113321201 is an apocalyptic number.

It is an amenable number.

243113321201 is a deficient number, since it is larger than the sum of its proper divisors (314507011).

243113321201 is an equidigital number, since it uses as much as digits as its factorization.

243113321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314507010.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 243113321201 its reverse (102123311342), we get a palindrome (345236632543).

The spelling of 243113321201 in words is "two hundred forty-three billion, one hundred thirteen million, three hundred twenty-one thousand, two hundred one".