5021221 has 2 divisors, whose sum is σ = 5021222. Its totient is φ = 5021220.

The previous prime is 5021213. The next prime is 5021227. The reversal of 5021221 is 1221205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5013121 + 8100 = 2239^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021221 - 2³ = 5021213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2510610 + 2510611.

It is an arithmetic number, because the mean of its divisors is an integer number (2510611).

Almost surely, 2^5021221 is an apocalyptic number.

It is an amenable number.

5021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5021221 is an equidigital number, since it uses as much as digits as its factorization.

5021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 5021221 is about 2240.8081131592. The cubic root of 5021221 is about 171.2391692228.

Adding to 5021221 its reverse (1221205), we get a palindrome (6242426).

The spelling of 5021221 in words is "five million, twenty-one thousand, two hundred twenty-one".