243404221201 has 4 divisors (see below), whose sum is σ = 251255970304. Its totient is φ = 235552472100.

The previous prime is 243404221111. The next prime is 243404221211. The reversal of 243404221201 is 102122404342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243404221201 - 2¹³ = 243404213009 is a prime.

It is a super-2 number, since 2×243404221201² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243404221211) 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, 3925874505 + ... + 3925874566.

It is an arithmetic number, because the mean of its divisors is an integer number (62813992576).

Almost surely, 2^243404221201 is an apocalyptic number.

It is an amenable number.

243404221201 is a deficient number, since it is larger than the sum of its proper divisors (7851749103).

243404221201 is an equidigital number, since it uses as much as digits as its factorization.

243404221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851749102.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 243404221201 its reverse (102122404342), we get a palindrome (345526625543).

The spelling of 243404221201 in words is "two hundred forty-three billion, four hundred four million, two hundred twenty-one thousand, two hundred one".