222011012221 has 2 divisors, whose sum is σ = 222011012222. Its totient is φ = 222011012220.

The previous prime is 222011012213. The next prime is 222011012231. The reversal of 222011012221 is 122210110222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170759032900 + 51251979321 = 413230^2 + 226389^2 .

It is a cyclic number.

It is not a de Polignac number, because 222011012221 - 2³ = 222011012213 is a prime.

It is a super-2 number, since 2×222011012221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 222011012195 and 222011012204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222011012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111005506110 + 111005506111.

It is an arithmetic number, because the mean of its divisors is an integer number (111005506111).

Almost surely, 2^222011012221 is an apocalyptic number.

It is an amenable number.

222011012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222011012221 is an equidigital number, since it uses as much as digits as its factorization.

222011012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222011012221 its reverse (122210110222), we get a palindrome (344221122443).

The spelling of 222011012221 in words is "two hundred twenty-two billion, eleven million, twelve thousand, two hundred twenty-one".