4224340331221 has 4 divisors (see below), whose sum is σ = 4226453560000. Its totient is φ = 4222227102444.

The previous prime is 4224340331173. The next prime is 4224340331243. The reversal of 4224340331221 is 1221330434224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4224340331221 - 2²³ = 4224331942613 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 (4224340331021) 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 in 3 ways as a sum of consecutive naturals, for example, 1056611391 + ... + 1056615388.

It is an arithmetic number, because the mean of its divisors is an integer number (1056613390000).

Almost surely, 2^{4224340331221} is an apocalyptic number.

It is an amenable number.

4224340331221 is a deficient number, since it is larger than the sum of its proper divisors (2113228779).

4224340331221 is a wasteful number, since it uses less digits than its factorization.

4224340331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113228778.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 4224340331221 its reverse (1221330434224), we get a palindrome (5445670765445).

The spelling of 4224340331221 in words is "four trillion, two hundred twenty-four billion, three hundred forty million, three hundred thirty-one thousand, two hundred twenty-one".