12002202122221 has 2 divisors, whose sum is σ = 12002202122222. Its totient is φ = 12002202122220.

The previous prime is 12002202122219. The next prime is 12002202122227. The reversal of 12002202122221 is 12222120220021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11525950310121 + 476251812100 = 3394989^2 + 690110^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002202122221 - 2¹ = 12002202122219 is a prime.

Together with 12002202122219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002202122227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001101061110 + 6001101061111.

It is an arithmetic number, because the mean of its divisors is an integer number (6001101061111).

Almost surely, 2^{12002202122221} is an apocalyptic number.

It is an amenable number.

12002202122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002202122221 is an equidigital number, since it uses as much as digits as its factorization.

12002202122221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12002202122221 its reverse (12222120220021), we get a palindrome (24224322342242).

The spelling of 12002202122221 in words is "twelve trillion, two billion, two hundred two million, one hundred twenty-two thousand, two hundred twenty-one".