222011223221 has 2 divisors, whose sum is σ = 222011223222. Its totient is φ = 222011223220.

The previous prime is 222011223197. The next prime is 222011223281. The reversal of 222011223221 is 122322110222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191887802500 + 30123420721 = 438050^2 + 173561^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011223221 - 2⁶ = 222011223157 is a prime.

It is a super-2 number, since 2×222011223221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222011223193 and 222011223202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222011223281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005611610 + 111005611611.

It is an arithmetic number, because the mean of its divisors is an integer number (111005611611).

Almost surely, 2^222011223221 is an apocalyptic number.

It is an amenable number.

222011223221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011223221 is an equidigital number, since it uses as much as digits as its factorization.

222011223221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 222011223221 its reverse (122322110222), we get a palindrome (344333333443).

The spelling of 222011223221 in words is "two hundred twenty-two billion, eleven million, two hundred twenty-three thousand, two hundred twenty-one".