212111320212 has 72 divisors (see below), whose sum is σ = 603781231872. Its totient is φ = 62202729600.

The previous prime is 212111320189. The next prime is 212111320237. The reversal of 212111320212 is 212023111212.

212111320212 is a `hidden beast` number, since 2 + 121 + 11 + 320 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8626993 + ... + 8651544.

Almost surely, 2^212111320212 is an apocalyptic number.

212111320212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212111320212 is an abundant number, since it is smaller than the sum of its proper divisors (391669911660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212111320212 is a wasteful number, since it uses less digits than its factorization.

212111320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17278589 (or 17278584 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 212111320212 its reverse (212023111212), we get a palindrome (424134431424).

The spelling of 212111320212 in words is "two hundred twelve billion, one hundred eleven million, three hundred twenty thousand, two hundred twelve".