22221003361 has 2 divisors, whose sum is σ = 22221003362. Its totient is φ = 22221003360.

The previous prime is 22221003359. The next prime is 22221003377. The reversal of 22221003361 is 16330012222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21092043361 + 1128960000 = 145231^2 + 33600^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221003361 - 2¹ = 22221003359 is a prime.

Together with 22221003359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22221003461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110501680 + 11110501681.

It is an arithmetic number, because the mean of its divisors is an integer number (11110501681).

Almost surely, 2^22221003361 is an apocalyptic number.

It is an amenable number.

22221003361 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221003361 is an equidigital number, since it uses as much as digits as its factorization.

22221003361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 22221003361 its reverse (16330012222), we get a palindrome (38551015583).

The spelling of 22221003361 in words is "twenty-two billion, two hundred twenty-one million, three thousand, three hundred sixty-one".