206231213213 has 2 divisors, whose sum is σ = 206231213214. Its totient is φ = 206231213212.

The previous prime is 206231213207. The next prime is 206231213269. The reversal of 206231213213 is 312312132602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199949382649 + 6281830564 = 447157^2 + 79258^2 .

It is a cyclic number.

It is not a de Polignac number, because 206231213213 - 2²² = 206227018909 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 (206231213413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103115606606 + 103115606607.

It is an arithmetic number, because the mean of its divisors is an integer number (103115606607).

Almost surely, 2^206231213213 is an apocalyptic number.

It is an amenable number.

206231213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

206231213213 is an equidigital number, since it uses as much as digits as its factorization.

206231213213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 206231213213 its reverse (312312132602), we get a palindrome (518543345815).

The spelling of 206231213213 in words is "two hundred six billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirteen".