12002020212121 has 2 divisors, whose sum is σ = 12002020212122. Its totient is φ = 12002020212120.

The previous prime is 12002020212107. The next prime is 12002020212151. The reversal of 12002020212121 is 12121202020021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8285071424400 + 3716948787721 = 2878380^2 + 1927939^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002020212121 - 2²⁹ = 12001483341209 is a prime.

It is a super-2 number, since 2×12002020212121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12002020212095 and 12002020212104.

It is not a weakly prime, because it can be changed into another prime (12002020212151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001010106060 + 6001010106061.

It is an arithmetic number, because the mean of its divisors is an integer number (6001010106061).

Almost surely, 2^{12002020212121} is an apocalyptic number.

It is an amenable number.

12002020212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002020212121 is an equidigital number, since it uses as much as digits as its factorization.

12002020212121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12002020212121 its reverse (12121202020021), we get a palindrome (24123222232142).

The spelling of 12002020212121 in words is "twelve trillion, two billion, twenty million, two hundred twelve thousand, one hundred twenty-one".