243413221201 has 4 divisors (see below), whose sum is σ = 243417264804. Its totient is φ = 243409177600.

The previous prime is 243413221127. The next prime is 243413221267. The reversal of 243413221201 is 102122314342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102122314342 = 2 ⋅51061157171.

It can be written as a sum of positive squares in 2 ways, for example, as 110077968400 + 133335252801 = 331780^2 + 365151^2 .

It is a cyclic number.

It is not a de Polignac number, because 243413221201 - 2⁹ = 243413220689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243413227201) 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, 1930120 + ... + 2052361.

It is an arithmetic number, because the mean of its divisors is an integer number (60854316201).

Almost surely, 2^243413221201 is an apocalyptic number.

It is an amenable number.

243413221201 is a deficient number, since it is larger than the sum of its proper divisors (4043603).

243413221201 is an equidigital number, since it uses as much as digits as its factorization.

243413221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043602.

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

Adding to 243413221201 its reverse (102122314342), we get a palindrome (345535535543).

The spelling of 243413221201 in words is "two hundred forty-three billion, four hundred thirteen million, two hundred twenty-one thousand, two hundred one".