243211343321 has 16 divisors (see below), whose sum is σ = 247392921600. Its totient is φ = 239059596048.

The previous prime is 243211343311. The next prime is 243211343339. The reversal of 243211343321 is 123343112342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243211343321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243211343311) 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 15 ways as a sum of consecutive naturals, for example, 18058436 + ... + 18071898.

It is an arithmetic number, because the mean of its divisors is an integer number (15462057600).

Almost surely, 2^243211343321 is an apocalyptic number.

It is an amenable number.

243211343321 is a deficient number, since it is larger than the sum of its proper divisors (4181578279).

243211343321 is a wasteful number, since it uses less digits than its factorization.

243211343321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14548.

The product of its digits is 10368, while the sum is 29.

Adding to 243211343321 its reverse (123343112342), we get a palindrome (366554455663).

The spelling of 243211343321 in words is "two hundred forty-three billion, two hundred eleven million, three hundred forty-three thousand, three hundred twenty-one".