5323121521 has 2 divisors, whose sum is σ = 5323121522. Its totient is φ = 5323121520.

The previous prime is 5323121519. The next prime is 5323121537. The reversal of 5323121521 is 1251213235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4036823296 + 1286298225 = 63536^2 + 35865^2 .

It is a cyclic number.

It is not a de Polignac number, because 5323121521 - 2¹ = 5323121519 is a prime.

Together with 5323121519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5323121501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2661560760 + 2661560761.

It is an arithmetic number, because the mean of its divisors is an integer number (2661560761).

Almost surely, 2^5323121521 is an apocalyptic number.

It is an amenable number.

5323121521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5323121521 is an equidigital number, since it uses as much as digits as its factorization.

5323121521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 5323121521 is about 72959.7253352834. The cubic root of 5323121521 is about 1746.0451120414.

Adding to 5323121521 its reverse (1251213235), we get a palindrome (6574334756).

The spelling of 5323121521 in words is "five billion, three hundred twenty-three million, one hundred twenty-one thousand, five hundred twenty-one".