212213111321 has 2 divisors, whose sum is σ = 212213111322. Its totient is φ = 212213111320.

The previous prime is 212213111317. The next prime is 212213111329. The reversal of 212213111321 is 123111312212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133707235600 + 78505875721 = 365660^2 + 280189^2 .

It is a cyclic number.

It is not a de Polignac number, because 212213111321 - 2² = 212213111317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212213111293 and 212213111302.

It is not a weakly prime, because it can be changed into another prime (212213111329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106555660 + 106106555661.

It is an arithmetic number, because the mean of its divisors is an integer number (106106555661).

Almost surely, 2^212213111321 is an apocalyptic number.

It is an amenable number.

212213111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212213111321 is an equidigital number, since it uses as much as digits as its factorization.

212213111321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

Adding to 212213111321 its reverse (123111312212), we get a palindrome (335324423533).

The spelling of 212213111321 in words is "two hundred twelve billion, two hundred thirteen million, one hundred eleven thousand, three hundred twenty-one".