43210244221 has 2 divisors, whose sum is σ = 43210244222. Its totient is φ = 43210244220.

The previous prime is 43210244171. The next prime is 43210244227. The reversal of 43210244221 is 12244201234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25789148100 + 17421096121 = 160590^2 + 131989^2 .

It is a cyclic number.

It is not a de Polignac number, because 43210244221 - 2⁹ = 43210243709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43210244227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605122110 + 21605122111.

It is an arithmetic number, because the mean of its divisors is an integer number (21605122111).

Almost surely, 2^43210244221 is an apocalyptic number.

It is an amenable number.

43210244221 is a deficient number, since it is larger than the sum of its proper divisors (1).

43210244221 is an equidigital number, since it uses as much as digits as its factorization.

43210244221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 43210244221 its reverse (12244201234), we get a palindrome (55454445455).

The spelling of 43210244221 in words is "forty-three billion, two hundred ten million, two hundred forty-four thousand, two hundred twenty-one".