243211423201 has 4 divisors (see below), whose sum is σ = 243267635392. Its totient is φ = 243155211012.

The previous prime is 243211423183. The next prime is 243211423277. The reversal of 243211423201 is 102324112342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 102324112342 = 2 ⋅51162056171.

It is a cyclic number.

It is not a de Polignac number, because 243211423201 - 2⁷ = 243211423073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243211493201) 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, 28099605 + ... + 28108258.

It is an arithmetic number, because the mean of its divisors is an integer number (60816908848).

Almost surely, 2^243211423201 is an apocalyptic number.

It is an amenable number.

243211423201 is a deficient number, since it is larger than the sum of its proper divisors (56212191).

243211423201 is an equidigital number, since it uses as much as digits as its factorization.

243211423201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56212190.

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

Adding to 243211423201 its reverse (102324112342), we get a palindrome (345535535543).

The spelling of 243211423201 in words is "two hundred forty-three billion, two hundred eleven million, four hundred twenty-three thousand, two hundred one".