12020300521 has 2 divisors, whose sum is σ = 12020300522. Its totient is φ = 12020300520.

The previous prime is 12020300507. The next prime is 12020300531. The reversal of 12020300521 is 12500302021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9411134121 + 2609166400 = 97011^2 + 51080^2 .

It is a cyclic number.

It is not a de Polignac number, because 12020300521 - 2¹¹ = 12020298473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020300495 and 12020300504.

It is not a weakly prime, because it can be changed into another prime (12020300531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010150260 + 6010150261.

It is an arithmetic number, because the mean of its divisors is an integer number (6010150261).

Almost surely, 2^12020300521 is an apocalyptic number.

It is an amenable number.

12020300521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12020300521 is an equidigital number, since it uses as much as digits as its factorization.

12020300521 is an evil number, because the sum of its binary digits is even.

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

Adding to 12020300521 its reverse (12500302021), we get a palindrome (24520602542).

The spelling of 12020300521 in words is "twelve billion, twenty million, three hundred thousand, five hundred twenty-one".