243421222001 has 4 divisors (see below), whose sum is σ = 243578981952. Its totient is φ = 243263462052.

The previous prime is 243421221971. The next prime is 243421222049. The reversal of 243421222001 is 100222124342.

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 243421222001 - 2²⁶ = 243354113137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243421222061) 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, 78877661 + ... + 78880746.

It is an arithmetic number, because the mean of its divisors is an integer number (60894745488).

Almost surely, 2^243421222001 is an apocalyptic number.

It is an amenable number.

243421222001 is a deficient number, since it is larger than the sum of its proper divisors (157759951).

243421222001 is a wasteful number, since it uses less digits than its factorization.

243421222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157759950.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 243421222001 its reverse (100222124342), we get a palindrome (343643346343).

The spelling of 243421222001 in words is "two hundred forty-three billion, four hundred twenty-one million, two hundred twenty-two thousand, one".