12002020022221 has 2 divisors, whose sum is σ = 12002020022222. Its totient is φ = 12002020022220.

The previous prime is 12002020022219. The next prime is 12002020022227. The reversal of 12002020022221 is 12222002020021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10446664336900 + 1555355685321 = 3232130^2 + 1247139^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002020022221 - 2¹ = 12002020022219 is a prime.

It is a super-2 number, since 2×12002020022221² (a number of 27 digits) contains 22 as substring.

Together with 12002020022219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12002020022195 and 12002020022204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12002020022227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001010011110 + 6001010011111.

It is an arithmetic number, because the mean of its divisors is an integer number (6001010011111).

Almost surely, 2^{12002020022221} is an apocalyptic number.

It is an amenable number.

12002020022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12002020022221 is an equidigital number, since it uses as much as digits as its factorization.

12002020022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12002020022221 its reverse (12222002020021), we get a palindrome (24224022042242).

The spelling of 12002020022221 in words is "twelve trillion, two billion, twenty million, twenty-two thousand, two hundred twenty-one".