4243210330221 has 12 divisors (see below), whose sum is σ = 6137010552348. Its totient is φ = 2825147364864.

The previous prime is 4243210330213. The next prime is 4243210330231. The reversal of 4243210330221 is 1220330123424.

4243210330221 is a `hidden beast` number, since 4 + 2 + 4 + 321 + 0 + 330 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1787940705321 + 2455269624900 = 1337139^2 + 1566930^2 .

It is not a de Polignac number, because 4243210330221 - 2³ = 4243210330213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243210330231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304952820 + ... + 304966733.

It is an arithmetic number, because the mean of its divisors is an integer number (511417546029).

Almost surely, 2^{4243210330221} is an apocalyptic number.

It is an amenable number.

4243210330221 is a deficient number, since it is larger than the sum of its proper divisors (1893800222127).

4243210330221 is a wasteful number, since it uses less digits than its factorization.

4243210330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609920332 (or 609920329 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 4243210330221 its reverse (1220330123424), we get a palindrome (5463540453645).

The spelling of 4243210330221 in words is "four trillion, two hundred forty-three billion, two hundred ten million, three hundred thirty thousand, two hundred twenty-one".