4821701221 has 2 divisors, whose sum is σ = 4821701222. Its totient is φ = 4821701220.

The previous prime is 4821701111. The next prime is 4821701243. The reversal of 4821701221 is 1221071284.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4647830625 + 173870596 = 68175^2 + 13186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4821701221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4821701221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4821701251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2410850610 + 2410850611.

It is an arithmetic number, because the mean of its divisors is an integer number (2410850611).

Almost surely, 2^4821701221 is an apocalyptic number.

It is an amenable number.

4821701221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4821701221 is an equidigital number, since it uses as much as digits as its factorization.

4821701221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 4821701221 is about 69438.4707564906. The cubic root of 4821701221 is about 1689.4036644654.

The spelling of 4821701221 in words is "four billion, eight hundred twenty-one million, seven hundred one thousand, two hundred twenty-one".