222002220221 has 2 divisors, whose sum is σ = 222002220222. Its totient is φ = 222002220220.

The previous prime is 222002220211. The next prime is 222002220287. The reversal of 222002220221 is 122022200222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136744644100 + 85257576121 = 369790^2 + 291989^2 .

It is a cyclic number.

It is not a de Polignac number, because 222002220221 - 2⁶ = 222002220157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222002220221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222002220211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111001110110 + 111001110111.

It is an arithmetic number, because the mean of its divisors is an integer number (111001110111).

Almost surely, 2^222002220221 is an apocalyptic number.

It is an amenable number.

222002220221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222002220221 is an equidigital number, since it uses as much as digits as its factorization.

222002220221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 222002220221 its reverse (122022200222), we get a palindrome (344024420443).

The spelling of 222002220221 in words is "two hundred twenty-two billion, two million, two hundred twenty thousand, two hundred twenty-one".