1211330149 has 2 divisors, whose sum is σ = 1211330150. Its totient is φ = 1211330148.

The previous prime is 1211330129. The next prime is 1211330171. The reversal of 1211330149 is 9410331121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210344100 + 986049 = 34790^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211330149 - 2¹⁹ = 1210805861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211330129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605665074 + 605665075.

It is an arithmetic number, because the mean of its divisors is an integer number (605665075).

Almost surely, 2^1211330149 is an apocalyptic number.

It is an amenable number.

1211330149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211330149 is an equidigital number, since it uses as much as digits as its factorization.

1211330149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1211330149 is about 34804.1685578035. The cubic root of 1211330149 is about 1065.9925647782.

The spelling of 1211330149 in words is "one billion, two hundred eleven million, three hundred thirty thousand, one hundred forty-nine".