12612364021 has 2 divisors, whose sum is σ = 12612364022. Its totient is φ = 12612364020.

The previous prime is 12612363997. The next prime is 12612364057. The reversal of 12612364021 is 12046321621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10427268996 + 2185095025 = 102114^2 + 46745^2 .

It is a cyclic number.

It is not a de Polignac number, because 12612364021 - 2⁷ = 12612363893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12610364021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6306182010 + 6306182011.

It is an arithmetic number, because the mean of its divisors is an integer number (6306182011).

Almost surely, 2^12612364021 is an apocalyptic number.

It is an amenable number.

12612364021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12612364021 is an equidigital number, since it uses as much as digits as its factorization.

12612364021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 12612364021 its reverse (12046321621), we get a palindrome (24658685642).

The spelling of 12612364021 in words is "twelve billion, six hundred twelve million, three hundred sixty-four thousand, twenty-one".