5201320021 has 2 divisors, whose sum is σ = 5201320022. Its totient is φ = 5201320020.

The previous prime is 5201319997. The next prime is 5201320067. The reversal of 5201320021 is 1200231025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4467451921 + 733868100 = 66839^2 + 27090^2 .

It is a cyclic number.

It is not a de Polignac number, because 5201320021 - 2²⁹ = 4664449109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5201319977 and 5201320004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5201390021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600660010 + 2600660011.

It is an arithmetic number, because the mean of its divisors is an integer number (2600660011).

Almost surely, 2^5201320021 is an apocalyptic number.

It is an amenable number.

5201320021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5201320021 is an equidigital number, since it uses as much as digits as its factorization.

5201320021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 5201320021 is about 72120.1776273464. The cubic root of 5201320021 is about 1732.6247949213.

Adding to 5201320021 its reverse (1200231025), we get a palindrome (6401551046).

The spelling of 5201320021 in words is "five billion, two hundred one million, three hundred twenty thousand, twenty-one".