243032111042221 has 4 divisors (see below), whose sum is σ = 250871856559744. Its totient is φ = 235192365524700.

The previous prime is 243032111042219. The next prime is 243032111042239. The reversal of 243032111042221 is 122240111230342.

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 243032111042221 - 2¹ = 243032111042219 is a prime.

It is a super-2 number, since 2×243032111042221² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243032111042221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243032111072221) 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, 3919872758715 + ... + 3919872758776.

It is an arithmetic number, because the mean of its divisors is an integer number (62717964139936).

Almost surely, 2^{243032111042221} is an apocalyptic number.

It is an amenable number.

243032111042221 is a deficient number, since it is larger than the sum of its proper divisors (7839745517523).

243032111042221 is an equidigital number, since it uses as much as digits as its factorization.

243032111042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7839745517522.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 243032111042221 its reverse (122240111230342), we get a palindrome (365272222272563).

The spelling of 243032111042221 in words is "two hundred forty-three trillion, thirty-two billion, one hundred eleven million, forty-two thousand, two hundred twenty-one".