221143443324 has 24 divisors (see below), whose sum is σ = 543159335040. Its totient is φ = 69834771504.

The previous prime is 221143443299. The next prime is 221143443341. The reversal of 221143443324 is 423344341122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 484963464 + ... + 484963919.

It is an arithmetic number, because the mean of its divisors is an integer number (22631638960).

Almost surely, 2^221143443324 is an apocalyptic number.

It is an amenable number.

221143443324 is an abundant number, since it is smaller than the sum of its proper divisors (322015891716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221143443324 is a wasteful number, since it uses less digits than its factorization.

221143443324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969927409 (or 969927407 counting only the distinct ones).

The product of its digits is 55296, while the sum is 33.

Adding to 221143443324 its reverse (423344341122), we get a palindrome (644487784446).

The spelling of 221143443324 in words is "two hundred twenty-one billion, one hundred forty-three million, four hundred forty-three thousand, three hundred twenty-four".