222242442221 has 2 divisors, whose sum is σ = 222242442222. Its totient is φ = 222242442220.

The previous prime is 222242442199. The next prime is 222242442269. The reversal of 222242442221 is 122244242222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144616681225 + 77625760996 = 380285^2 + 278614^2 .

It is a cyclic number.

It is not a de Polignac number, because 222242442221 - 2⁶ = 222242442157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222242442281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111121221110 + 111121221111.

It is an arithmetic number, because the mean of its divisors is an integer number (111121221111).

Almost surely, 2^222242442221 is an apocalyptic number.

It is an amenable number.

222242442221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222242442221 is an equidigital number, since it uses as much as digits as its factorization.

222242442221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16384, while the sum is 29.

Adding to 222242442221 its reverse (122244242222), we get a palindrome (344486684443).

The spelling of 222242442221 in words is "two hundred twenty-two billion, two hundred forty-two million, four hundred forty-two thousand, two hundred twenty-one".