5120221 has 2 divisors, whose sum is σ = 5120222. Its totient is φ = 5120220.

The previous prime is 5120201. The next prime is 5120231. The reversal of 5120221 is 1220215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 8100 = 2261^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 5120221 - 2⁵ = 5120189 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5120201) 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, 2560110 + 2560111.

It is an arithmetic number, because the mean of its divisors is an integer number (2560111).

Almost surely, 2^5120221 is an apocalyptic number.

It is an amenable number.

5120221 is a deficient number, since it is larger than the sum of its proper divisors (1).

5120221 is an equidigital number, since it uses as much as digits as its factorization.

5120221 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 5120221 is about 2262.7905338321. The cubic root of 5120221 is about 172.3572550110.

Adding to 5120221 its reverse (1220215), we get a palindrome (6340436).

The spelling of 5120221 in words is "five million, one hundred twenty thousand, two hundred twenty-one".