12006210521 has 2 divisors, whose sum is σ = 12006210522. Its totient is φ = 12006210520.

The previous prime is 12006210499. The next prime is 12006210529. The reversal of 12006210521 is 12501260021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11894083600 + 112126921 = 109060^2 + 10589^2 .

It is a cyclic number.

It is not a de Polignac number, because 12006210521 - 2¹⁸ = 12005948377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12006210493 and 12006210502.

It is not a weakly prime, because it can be changed into another prime (12006210529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6003105260 + 6003105261.

It is an arithmetic number, because the mean of its divisors is an integer number (6003105261).

Almost surely, 2^12006210521 is an apocalyptic number.

It is an amenable number.

12006210521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12006210521 is an equidigital number, since it uses as much as digits as its factorization.

12006210521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 12006210521 its reverse (12501260021), we get a palindrome (24507470542).

The spelling of 12006210521 in words is "twelve billion, six million, two hundred ten thousand, five hundred twenty-one".