221332321234243 has 2 divisors, whose sum is σ = 221332321234244. Its totient is φ = 221332321234242.

The previous prime is 221332321234237. The next prime is 221332321234253. The reversal of 221332321234243 is 342432123233122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221332321234243 is a prime.

It is a super-3 number, since 3×221332321234243³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (221332321234223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666160617121 + 110666160617122.

It is an arithmetic number, because the mean of its divisors is an integer number (110666160617122).

Almost surely, 2^{221332321234243} is an apocalyptic number.

221332321234243 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332321234243 is an equidigital number, since it uses as much as digits as its factorization.

221332321234243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 37.

Adding to 221332321234243 its reverse (342432123233122), we get a palindrome (563764444467365).

The spelling of 221332321234243 in words is "two hundred twenty-one trillion, three hundred thirty-two billion, three hundred twenty-one million, two hundred thirty-four thousand, two hundred forty-three".