5321798021 has 2 divisors, whose sum is σ = 5321798022. Its totient is φ = 5321798020.

The previous prime is 5321797933. The next prime is 5321798059. The reversal of 5321798021 is 1208971235.

It is an a-pointer prime, because the next prime (5321798059) can be obtained adding 5321798021 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5110677121 + 211120900 = 71489^2 + 14530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5321798021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5321798081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660899010 + 2660899011.

It is an arithmetic number, because the mean of its divisors is an integer number (2660899011).

Almost surely, 2^5321798021 is an apocalyptic number.

It is an amenable number.

5321798021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5321798021 is an equidigital number, since it uses as much as digits as its factorization.

5321798021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 5321798021 is about 72950.6546989127. The cubic root of 5321798021 is about 1745.9003923036.

The spelling of 5321798021 in words is "five billion, three hundred twenty-one million, seven hundred ninety-eight thousand, twenty-one".