1223213237 has 2 divisors, whose sum is σ = 1223213238. Its totient is φ = 1223213236.

The previous prime is 1223213227. The next prime is 1223213269. The reversal of 1223213237 is 7323123221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191561361 + 31651876 = 34519^2 + 5626^2 .

It is an emirp because it is prime and its reverse (7323123221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223213237 - 2¹⁰ = 1223212213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223213227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611606618 + 611606619.

It is an arithmetic number, because the mean of its divisors is an integer number (611606619).

Almost surely, 2^1223213237 is an apocalyptic number.

It is an amenable number.

1223213237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223213237 is an equidigital number, since it uses as much as digits as its factorization.

1223213237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 26.

The square root of 1223213237 is about 34974.4654998472. The cubic root of 1223213237 is about 1069.4670059237.

Adding to 1223213237 its reverse (7323123221), we get a palindrome (8546336458).

The spelling of 1223213237 in words is "one billion, two hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-seven".