1222205737 has 2 divisors, whose sum is σ = 1222205738. Its totient is φ = 1222205736.

The previous prime is 1222205711. The next prime is 1222205749. The reversal of 1222205737 is 7375022221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 832380201 + 389825536 = 28851^2 + 19744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222205737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222205699 and 1222205708.

It is not a weakly prime, because it can be changed into another prime (1222205707) 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, 611102868 + 611102869.

It is an arithmetic number, because the mean of its divisors is an integer number (611102869).

Almost surely, 2^1222205737 is an apocalyptic number.

It is an amenable number.

1222205737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222205737 is an equidigital number, since it uses as much as digits as its factorization.

1222205737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 1222205737 is about 34960.0591675701. The cubic root of 1222205737 is about 1069.1733029846.

Adding to 1222205737 its reverse (7375022221), we get a palindrome (8597227958).

The spelling of 1222205737 in words is "one billion, two hundred twenty-two million, two hundred five thousand, seven hundred thirty-seven".