243122054221 has 8 divisors (see below), whose sum is σ = 244227239424. Its totient is φ = 242017002960.

The previous prime is 243122054213. The next prime is 243122054233. The reversal of 243122054221 is 122450221342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243122054221 - 2³ = 243122054213 is a prime.

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 243122054221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243122054261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6340176 + ... + 6378406.

It is an arithmetic number, because the mean of its divisors is an integer number (30528404928).

Almost surely, 2^243122054221 is an apocalyptic number.

It is an amenable number.

243122054221 is a deficient number, since it is larger than the sum of its proper divisors (1105185203).

243122054221 is a wasteful number, since it uses less digits than its factorization.

243122054221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66971.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 243122054221 its reverse (122450221342), we get a palindrome (365572275563).

The spelling of 243122054221 in words is "two hundred forty-three billion, one hundred twenty-two million, fifty-four thousand, two hundred twenty-one".