1211223241 has 2 divisors, whose sum is σ = 1211223242. Its totient is φ = 1211223240.

The previous prime is 1211223197. The next prime is 1211223281. The reversal of 1211223241 is 1423221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 936360000 + 274863241 = 30600^2 + 16579^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211223241 - 2⁷ = 1211223113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211223281) 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, 605611620 + 605611621.

It is an arithmetic number, because the mean of its divisors is an integer number (605611621).

Almost surely, 2^1211223241 is an apocalyptic number.

It is an amenable number.

1211223241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211223241 is an equidigital number, since it uses as much as digits as its factorization.

1211223241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 1211223241 is about 34802.6326734056. The cubic root of 1211223241 is about 1065.9612035273.

Adding to 1211223241 its reverse (1423221121), we get a palindrome (2634444362).

It can be divided in two parts, 12112 and 23241, that added together give a palindrome (35353).

The spelling of 1211223241 in words is "one billion, two hundred eleven million, two hundred twenty-three thousand, two hundred forty-one".