212311222213 has 8 divisors (see below), whose sum is σ = 217542341016. Its totient is φ = 207082617600.

The previous prime is 212311222199. The next prime is 212311222247. The reversal of 212311222213 is 312222113212.

It can be written as a sum of positive squares in 4 ways, for example, as 8709928929 + 203601293284 = 93327^2 + 451222^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212311222213 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 (212311222273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457008 + ... + 795913.

It is an arithmetic number, because the mean of its divisors is an integer number (27192792627).

Almost surely, 2^212311222213 is an apocalyptic number.

It is an amenable number.

212311222213 is a deficient number, since it is larger than the sum of its proper divisors (5231118803).

212311222213 is a wasteful number, since it uses less digits than its factorization.

212311222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257095.

The product of its digits is 576, while the sum is 22.

Adding to 212311222213 its reverse (312222113212), we get a palindrome (524533335425).

The spelling of 212311222213 in words is "two hundred twelve billion, three hundred eleven million, two hundred twenty-two thousand, two hundred thirteen".