212531332213 has 2 divisors, whose sum is σ = 212531332214. Its totient is φ = 212531332212.

The previous prime is 212531332199. The next prime is 212531332217. The reversal of 212531332213 is 312233135212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212264761284 + 266570929 = 460722^2 + 16327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212531332213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212531332217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106265666106 + 106265666107.

It is an arithmetic number, because the mean of its divisors is an integer number (106265666107).

Almost surely, 2^212531332213 is an apocalyptic number.

It is an amenable number.

212531332213 is a deficient number, since it is larger than the sum of its proper divisors (1).

212531332213 is an equidigital number, since it uses as much as digits as its factorization.

212531332213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

Adding to 212531332213 its reverse (312233135212), we get a palindrome (524764467425).

The spelling of 212531332213 in words is "two hundred twelve billion, five hundred thirty-one million, three hundred thirty-two thousand, two hundred thirteen".