5316421021 has 2 divisors, whose sum is σ = 5316421022. Its totient is φ = 5316421020.

The previous prime is 5316421013. The next prime is 5316421031. The reversal of 5316421021 is 1201246135.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5297801796 + 18619225 = 72786^2 + 4315^2 .

It is a cyclic number.

It is not a de Polignac number, because 5316421021 - 2³ = 5316421013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5316421031) 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, 2658210510 + 2658210511.

It is an arithmetic number, because the mean of its divisors is an integer number (2658210511).

Almost surely, 2^5316421021 is an apocalyptic number.

It is an amenable number.

5316421021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5316421021 is an equidigital number, since it uses as much as digits as its factorization.

5316421021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 5316421021 is about 72913.7917063706. The cubic root of 5316421021 is about 1745.3121907319.

Adding to 5316421021 its reverse (1201246135), we get a palindrome (6517667156).

The spelling of 5316421021 in words is "five billion, three hundred sixteen million, four hundred twenty-one thousand, twenty-one".