212312213213 has 2 divisors, whose sum is σ = 212312213214. Its totient is φ = 212312213212.

The previous prime is 212312213153. The next prime is 212312213219. The reversal of 212312213213 is 312312213212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203244983929 + 9067229284 = 450827^2 + 95222^2 .

It is a cyclic number.

It is not a de Polignac number, because 212312213213 - 2¹⁴ = 212312196829 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 (212312213219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156106606 + 106156106607.

It is an arithmetic number, because the mean of its divisors is an integer number (106156106607).

Almost surely, 2^212312213213 is an apocalyptic number.

It is an amenable number.

212312213213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212312213213 is an equidigital number, since it uses as much as digits as its factorization.

212312213213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

Adding to 212312213213 its reverse (312312213212), we get a palindrome (524624426425).

Subtracting 212312213213 from its reverse (312312213212), we obtain a palindrome (99999999999).

The spelling of 212312213213 in words is "two hundred twelve billion, three hundred twelve million, two hundred thirteen thousand, two hundred thirteen".