421482221 has 2 divisors, whose sum is σ = 421482222. Its totient is φ = 421482220.

The previous prime is 421482163. The next prime is 421482247. The reversal of 421482221 is 122284124.

It is an a-pointer prime, because the next prime (421482247) can be obtained adding 421482221 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418202500 + 3279721 = 20450^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 421482221 - 2¹⁸ = 421220077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421482421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210741110 + 210741111.

It is an arithmetic number, because the mean of its divisors is an integer number (210741111).

Almost surely, 2^421482221 is an apocalyptic number.

It is an amenable number.

421482221 is a deficient number, since it is larger than the sum of its proper divisors (1).

421482221 is an equidigital number, since it uses as much as digits as its factorization.

421482221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2048, while the sum is 26.

The square root of 421482221 is about 20530.0321724054. The cubic root of 421482221 is about 749.7671698017.

The spelling of 421482221 in words is "four hundred twenty-one million, four hundred eighty-two thousand, two hundred twenty-one".