11311042213 has 2 divisors, whose sum is σ = 11311042214. Its totient is φ = 11311042212.

The previous prime is 11311042151. The next prime is 11311042219. The reversal of 11311042213 is 31224011311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7361296804 + 3949745409 = 85798^2 + 62847^2 .

It is a cyclic number.

It is not a de Polignac number, because 11311042213 - 2²¹ = 11308945061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311042219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655521106 + 5655521107.

It is an arithmetic number, because the mean of its divisors is an integer number (5655521107).

Almost surely, 2^11311042213 is an apocalyptic number.

It is an amenable number.

11311042213 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311042213 is an equidigital number, since it uses as much as digits as its factorization.

11311042213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11311042213 its reverse (31224011311), we get a palindrome (42535053524).

The spelling of 11311042213 in words is "eleven billion, three hundred eleven million, forty-two thousand, two hundred thirteen".