212111213213 has 8 divisors (see below), whose sum is σ = 224700842232. Its totient is φ = 199534084096.

The previous prime is 212111213177. The next prime is 212111213227. The reversal of 212111213213 is 312312111212.

It can be written as a sum of positive squares in 4 ways, for example, as 26361419044 + 185749794169 = 162362^2 + 430987^2 .

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 212111213213 - 2²⁴ = 212094435997 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 (212111213263) 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, 3090020 + ... + 3157917.

It is an arithmetic number, because the mean of its divisors is an integer number (28087605279).

Almost surely, 2^212111213213 is an apocalyptic number.

It is an amenable number.

212111213213 is a deficient number, since it is larger than the sum of its proper divisors (12589629019).

212111213213 is a wasteful number, since it uses less digits than its factorization.

212111213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249951.

The product of its digits is 144, while the sum is 20.

Adding to 212111213213 its reverse (312312111212), we get a palindrome (524423324425).

The spelling of 212111213213 in words is "two hundred twelve billion, one hundred eleven million, two hundred thirteen thousand, two hundred thirteen".