221213340343 has 16 divisors (see below), whose sum is σ = 224296300800. Its totient is φ = 218153183040.

The previous prime is 221213340323. The next prime is 221213340347. The reversal of 221213340343 is 343043312122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221213340343 - 2⁵ = 221213340311 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 (221213340347) 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, 58690963 + ... + 58694731.

It is an arithmetic number, because the mean of its divisors is an integer number (14018518800).

Almost surely, 2^221213340343 is an apocalyptic number.

221213340343 is a deficient number, since it is larger than the sum of its proper divisors (3082960457).

221213340343 is a wasteful number, since it uses less digits than its factorization.

221213340343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 221213340343 its reverse (343043312122), we get a palindrome (564256652465).

The spelling of 221213340343 in words is "two hundred twenty-one billion, two hundred thirteen million, three hundred forty thousand, three hundred forty-three".