1211030213 has 2 divisors, whose sum is σ = 1211030214. Its totient is φ = 1211030212.

The previous prime is 1211030143. The next prime is 1211030291. The reversal of 1211030213 is 3120301121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 850713889 + 360316324 = 29167^2 + 18982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211030213 - 2²² = 1206835909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211030413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605515106 + 605515107.

It is an arithmetic number, because the mean of its divisors is an integer number (605515107).

Almost surely, 2^1211030213 is an apocalyptic number.

It is an amenable number.

1211030213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211030213 is an equidigital number, since it uses as much as digits as its factorization.

1211030213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1211030213 is about 34799.8593818998. The cubic root of 1211030213 is about 1065.9045744701.

Adding to 1211030213 its reverse (3120301121), we get a palindrome (4331331334).

The spelling of 1211030213 in words is "one billion, two hundred eleven million, thirty thousand, two hundred thirteen".