3841220221 has 2 divisors, whose sum is σ = 3841220222. Its totient is φ = 3841220220.

The previous prime is 3841220213. The next prime is 3841220267. The reversal of 3841220221 is 1220221483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3448625625 + 392594596 = 58725^2 + 19814^2 .

It is a cyclic number.

It is not a de Polignac number, because 3841220221 - 2³ = 3841220213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3841220821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1920610110 + 1920610111.

It is an arithmetic number, because the mean of its divisors is an integer number (1920610111).

Almost surely, 2^3841220221 is an apocalyptic number.

It is an amenable number.

3841220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3841220221 is an equidigital number, since it uses as much as digits as its factorization.

3841220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 3841220221 is about 61977.5783731504. The cubic root of 3841220221 is about 1566.1129070859.

The spelling of 3841220221 in words is "three billion, eight hundred forty-one million, two hundred twenty thousand, two hundred twenty-one".