2212021321 has 2 divisors, whose sum is σ = 2212021322. Its totient is φ = 2212021320.

The previous prime is 2212021309. The next prime is 2212021327. The reversal of 2212021321 is 1231202122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1792590921 + 419430400 = 42339^2 + 20480^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212021321 - 2⁹ = 2212020809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2212021295 and 2212021304.

It is not a weakly prime, because it can be changed into another prime (2212021327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106010660 + 1106010661.

It is an arithmetic number, because the mean of its divisors is an integer number (1106010661).

Almost surely, 2^2212021321 is an apocalyptic number.

It is an amenable number.

2212021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212021321 is an equidigital number, since it uses as much as digits as its factorization.

2212021321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2212021321 is about 47032.1307299595. The cubic root of 2212021321 is about 1302.9560583576.

Adding to 2212021321 its reverse (1231202122), we get a palindrome (3443223443).

The spelling of 2212021321 in words is "two billion, two hundred twelve million, twenty-one thousand, three hundred twenty-one".