212216612213 has 8 divisors (see below), whose sum is σ = 215538211800. Its totient is φ = 208915838208.

The previous prime is 212216612197. The next prime is 212216612233. The reversal of 212216612213 is 312216612212.

It can be written as a sum of positive squares in 4 ways, for example, as 72704651044 + 139511961169 = 269638^2 + 373513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212216612213 - 2⁴ = 212216612197 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 (212216612233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5185856 + ... + 5226617.

It is an arithmetic number, because the mean of its divisors is an integer number (26942276475).

Almost surely, 2^212216612213 is an apocalyptic number.

It is an amenable number.

212216612213 is a deficient number, since it is larger than the sum of its proper divisors (3321599587).

212216612213 is a wasteful number, since it uses less digits than its factorization.

212216612213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10412791.

The product of its digits is 3456, while the sum is 29.

Subtracting 212216612213 from its reverse (312216612212), we obtain a palindrome (99999999999).

The spelling of 212216612213 in words is "two hundred twelve billion, two hundred sixteen million, six hundred twelve thousand, two hundred thirteen".