243342424011221 has 16 divisors (see below), whose sum is σ = 244205764927488. Its totient is φ = 242480985793200.

The previous prime is 243342424011217. The next prime is 243342424011257. The reversal of 243342424011221 is 122110424243342.

It is a cyclic number.

It is not a de Polignac number, because 243342424011221 - 2² = 243342424011217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243342424017221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790249916 + ... + 790557786.

It is an arithmetic number, because the mean of its divisors is an integer number (15262860307968).

Almost surely, 2^{243342424011221} is an apocalyptic number.

It is an amenable number.

243342424011221 is a deficient number, since it is larger than the sum of its proper divisors (863340916267).

243342424011221 is a wasteful number, since it uses less digits than its factorization.

243342424011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310952.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 243342424011221 its reverse (122110424243342), we get a palindrome (365452848254563).

The spelling of 243342424011221 in words is "two hundred forty-three trillion, three hundred forty-two billion, four hundred twenty-four million, eleven thousand, two hundred twenty-one".