5321000123521 has 2 divisors, whose sum is σ = 5321000123522. Its totient is φ = 5321000123520.

The previous prime is 5321000123473. The next prime is 5321000123533. The reversal of 5321000123521 is 1253210001235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4947795204496 + 373204919025 = 2224364^2 + 610905^2 .

It is a cyclic number.

It is not a de Polignac number, because 5321000123521 - 2¹⁵ = 5321000090753 is a prime.

It is not a weakly prime, because it can be changed into another prime (5321000123221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2660500061760 + 2660500061761.

It is an arithmetic number, because the mean of its divisors is an integer number (2660500061761).

Almost surely, 2^{5321000123521} is an apocalyptic number.

It is an amenable number.

5321000123521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5321000123521 is an equidigital number, since it uses as much as digits as its factorization.

5321000123521 is an evil number, because the sum of its binary digits is even.

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

Adding to 5321000123521 its reverse (1253210001235), we get a palindrome (6574210124756).

The spelling of 5321000123521 in words is "five trillion, three hundred twenty-one billion, one hundred twenty-three thousand, five hundred twenty-one".