212112211213 has 6 divisors (see below), whose sum is σ = 246742776366. Its totient is φ = 181810466712.

The previous prime is 212112211159. The next prime is 212112211253. The reversal of 212112211213 is 312112211212.

It can be written as a sum of positive squares in only one way, i.e., 194518045764 + 17594165449 = 441042^2 + 132643^2 .

It is a de Polignac number, because none of the positive numbers 2^k-212112211213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112211253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2164410270 + ... + 2164410367.

It is an arithmetic number, because the mean of its divisors is an integer number (41123796061).

Almost surely, 2^212112211213 is an apocalyptic number.

It is an amenable number.

212112211213 is a deficient number, since it is larger than the sum of its proper divisors (34630565153).

212112211213 is an equidigital number, since it uses as much as digits as its factorization.

212112211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328820651 (or 4328820644 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

Adding to 212112211213 its reverse (312112211212), we get a palindrome (524224422425).

Subtracting 212112211213 from its reverse (312112211212), we obtain a palindrome (99999999999).

The spelling of 212112211213 in words is "two hundred twelve billion, one hundred twelve million, two hundred eleven thousand, two hundred thirteen".