22211334221 has 2 divisors, whose sum is σ = 22211334222. Its totient is φ = 22211334220.

The previous prime is 22211334161. The next prime is 22211334239. The reversal of 22211334221 is 12243311222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20217711721 + 1993622500 = 142189^2 + 44650^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211334221 - 2⁶ = 22211334157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211334521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105667110 + 11105667111.

It is an arithmetic number, because the mean of its divisors is an integer number (11105667111).

Almost surely, 2^22211334221 is an apocalyptic number.

It is an amenable number.

22211334221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211334221 is an equidigital number, since it uses as much as digits as its factorization.

22211334221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

Adding to 22211334221 its reverse (12243311222), we get a palindrome (34454645443).

The spelling of 22211334221 in words is "twenty-two billion, two hundred eleven million, three hundred thirty-four thousand, two hundred twenty-one".