1223330221 has 2 divisors, whose sum is σ = 1223330222. Its totient is φ = 1223330220.

The previous prime is 1223330209. The next prime is 1223330237. The reversal of 1223330221 is 1220333221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994140900 + 229189321 = 31530^2 + 15139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223330221 - 2⁵ = 1223330189 is a prime.

It is a super-2 number, since 2×1223330221² = 2993073659223817682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223330201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611665110 + 611665111.

It is an arithmetic number, because the mean of its divisors is an integer number (611665111).

Almost surely, 2^1223330221 is an apocalyptic number.

It is an amenable number.

1223330221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223330221 is an equidigital number, since it uses as much as digits as its factorization.

1223330221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1223330221 is about 34976.1378799890. The cubic root of 1223330221 is about 1069.5010982460.

Adding to 1223330221 its reverse (1220333221), we get a palindrome (2443663442).

The spelling of 1223330221 in words is "one billion, two hundred twenty-three million, three hundred thirty thousand, two hundred twenty-one".