12012002621 has 2 divisors, whose sum is σ = 12012002622. Its totient is φ = 12012002620.

The previous prime is 12012002617. The next prime is 12012002671. The reversal of 12012002621 is 12620021021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9822792100 + 2189210521 = 99110^2 + 46789^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012002621 - 2² = 12012002617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12012002621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012002671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006001310 + 6006001311.

It is an arithmetic number, because the mean of its divisors is an integer number (6006001311).

Almost surely, 2^12012002621 is an apocalyptic number.

It is an amenable number.

12012002621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012002621 is an equidigital number, since it uses as much as digits as its factorization.

12012002621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12012002621 its reverse (12620021021), we get a palindrome (24632023642).

The spelling of 12012002621 in words is "twelve billion, twelve million, two thousand, six hundred twenty-one".