2212122221321 has 2 divisors, whose sum is σ = 2212122221322. Its totient is φ = 2212122221320.

The previous prime is 2212122221317. The next prime is 2212122221341. The reversal of 2212122221321 is 1231222212122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1356933765625 + 855188455696 = 1164875^2 + 924764^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212122221321 - 2² = 2212122221317 is a prime.

It is not a weakly prime, because it can be changed into another prime (2212122221341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106061110660 + 1106061110661.

It is an arithmetic number, because the mean of its divisors is an integer number (1106061110661).

Almost surely, 2^{2212122221321} is an apocalyptic number.

It is an amenable number.

2212122221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212122221321 is an equidigital number, since it uses as much as digits as its factorization.

2212122221321 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2212122221321 its reverse (1231222212122), we get a palindrome (3443344433443).

The spelling of 2212122221321 in words is "two trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, three hundred twenty-one".