12122031222221 has 2 divisors, whose sum is σ = 12122031222222. Its totient is φ = 12122031222220.

The previous prime is 12122031222199. The next prime is 12122031222229. The reversal of 12122031222221 is 12222213022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12094188628900 + 27842593321 = 3477670^2 + 166861^2 .

It is a cyclic number.

It is not a de Polignac number, because 12122031222221 - 2³⁰ = 12120957480397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122031222229) 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, 6061015611110 + 6061015611111.

It is an arithmetic number, because the mean of its divisors is an integer number (6061015611111).

Almost surely, 2^{12122031222221} is an apocalyptic number.

It is an amenable number.

12122031222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122031222221 is an equidigital number, since it uses as much as digits as its factorization.

12122031222221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12122031222221 its reverse (12222213022121), we get a palindrome (24344244244342).

The spelling of 12122031222221 in words is "twelve trillion, one hundred twenty-two billion, thirty-one million, two hundred twenty-two thousand, two hundred twenty-one".