12222120212021 has 2 divisors, whose sum is σ = 12222120212022. Its totient is φ = 12222120212020.

The previous prime is 12222120212009. The next prime is 12222120212023. The reversal of 12222120212021 is 12021202122221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10231873612900 + 1990246599121 = 3198730^2 + 1410761^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222120212021 - 2⁶ = 12222120211957 is a prime.

Together with 12222120212023, 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 = 12222120211984 and 12222120212002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222120212023) 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, 6111060106010 + 6111060106011.

It is an arithmetic number, because the mean of its divisors is an integer number (6111060106011).

Almost surely, 2^{12222120212021} is an apocalyptic number.

It is an amenable number.

12222120212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222120212021 is an equidigital number, since it uses as much as digits as its factorization.

12222120212021 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 20.

Adding to 12222120212021 its reverse (12021202122221), we get a palindrome (24243322334242).

The spelling of 12222120212021 in words is "twelve trillion, two hundred twenty-two billion, one hundred twenty million, two hundred twelve thousand, twenty-one".