221312330343 has 24 divisors (see below), whose sum is σ = 356134789920. Its totient is φ = 131495918400.

The previous prime is 221312330269. The next prime is 221312330347. The reversal of 221312330343 is 343033213122.

221312330343 is a `hidden beast` number, since 2 + 2 + 1 + 312 + 3 + 3 + 0 + 343 = 666.

It is not a de Polignac number, because 221312330343 - 2¹² = 221312326247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312330347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32609683 + ... + 32616468.

It is an arithmetic number, because the mean of its divisors is an integer number (14838949580).

Almost surely, 2^221312330343 is an apocalyptic number.

221312330343 is a deficient number, since it is larger than the sum of its proper divisors (134822459577).

221312330343 is a wasteful number, since it uses less digits than its factorization.

221312330343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65226199 (or 65226196 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 221312330343 its reverse (343033213122), we get a palindrome (564345543465).

The spelling of 221312330343 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred thirty thousand, three hundred forty-three".