4224312525221 has 8 divisors (see below), whose sum is σ = 4231502498520. Its totient is φ = 4217126441472.

The previous prime is 4224312525151. The next prime is 4224312525247. The reversal of 4224312525221 is 1225252134224.

It can be written as a sum of positive squares in 4 ways, for example, as 1337524632196 + 2886787893025 = 1156514^2 + 1699055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4224312525221 - 2¹⁸ = 4224312263077 is a prime.

It is a super-2 number, since 2×4224312525221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4226312525221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205741 + ... + 3146813.

It is an arithmetic number, because the mean of its divisors is an integer number (528937812315).

Almost surely, 2^{4224312525221} is an apocalyptic number.

It is an amenable number.

4224312525221 is a deficient number, since it is larger than the sum of its proper divisors (7189973299).

4224312525221 is a wasteful number, since it uses less digits than its factorization.

4224312525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944775.

The product of its digits is 76800, while the sum is 35.

Adding to 4224312525221 its reverse (1225252134224), we get a palindrome (5449564659445).

The spelling of 4224312525221 in words is "four trillion, two hundred twenty-four billion, three hundred twelve million, five hundred twenty-five thousand, two hundred twenty-one".