12120002021 has 2 divisors, whose sum is σ = 12120002022. Its totient is φ = 12120002020.

The previous prime is 12120002009. The next prime is 12120002023. The reversal of 12120002021 is 12020002121.

It is a happy number.

12120002021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10965021796 + 1154980225 = 104714^2 + 33985^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120002021 - 2¹⁴ = 12119985637 is a prime.

Together with 12120002023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120001993 and 12120002011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12120002023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060001010 + 6060001011.

It is an arithmetic number, because the mean of its divisors is an integer number (6060001011).

Almost surely, 2^12120002021 is an apocalyptic number.

It is an amenable number.

12120002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120002021 is an equidigital number, since it uses as much as digits as its factorization.

12120002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12120002021 its reverse (12020002121), we get a palindrome (24140004142).

The spelling of 12120002021 in words is "twelve billion, one hundred twenty million, two thousand, twenty-one".