222011221321 has 2 divisors, whose sum is σ = 222011221322. Its totient is φ = 222011221320.

The previous prime is 222011221307. The next prime is 222011221351. The reversal of 222011221321 is 123122110222.

222011221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211656123721 + 10355097600 = 460061^2 + 101760^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011221321 - 2²³ = 222002832713 is a prime.

It is not a weakly prime, because it can be changed into another prime (222011221301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005610660 + 111005610661.

It is an arithmetic number, because the mean of its divisors is an integer number (111005610661).

Almost surely, 2^222011221321 is an apocalyptic number.

It is an amenable number.

222011221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011221321 is an equidigital number, since it uses as much as digits as its factorization.

222011221321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 222011221321 its reverse (123122110222), we get a palindrome (345133331543).

The spelling of 222011221321 in words is "two hundred twenty-two billion, eleven million, two hundred twenty-one thousand, three hundred twenty-one".