211242323213 has 2 divisors, whose sum is σ = 211242323214. Its totient is φ = 211242323212.

The previous prime is 211242323203. The next prime is 211242323249. The reversal of 211242323213 is 312323242112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118338064009 + 92904259204 = 344003^2 + 304802^2 .

It is a cyclic number.

It is not a de Polignac number, because 211242323213 - 2¹² = 211242319117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211242323203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105621161606 + 105621161607.

It is an arithmetic number, because the mean of its divisors is an integer number (105621161607).

Almost surely, 2^211242323213 is an apocalyptic number.

It is an amenable number.

211242323213 is a deficient number, since it is larger than the sum of its proper divisors (1).

211242323213 is an equidigital number, since it uses as much as digits as its factorization.

211242323213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

Adding to 211242323213 its reverse (312323242112), we get a palindrome (523565565325).

The spelling of 211242323213 in words is "two hundred eleven billion, two hundred forty-two million, three hundred twenty-three thousand, two hundred thirteen".