211312212 has 24 divisors (see below), whose sum is σ = 510064800. Its totient is φ = 68008416.

The previous prime is 211312181. The next prime is 211312223. The reversal of 211312212 is 212213112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 211312191 and 211312200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303262 + ... + 303957.

It is an arithmetic number, because the mean of its divisors is an integer number (21252700).

Almost surely, 2^211312212 is an apocalyptic number.

It is an amenable number.

211312212 is an abundant number, since it is smaller than the sum of its proper divisors (298752588).

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

211312212 is a wasteful number, since it uses less digits than its factorization.

211312212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607255 (or 607253 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 211312212 is about 14536.5818540673. The cubic root of 211312212 is about 595.6276708472.

Adding to 211312212 its reverse (212213112), we get a palindrome (423525324).

The spelling of 211312212 in words is "two hundred eleven million, three hundred twelve thousand, two hundred twelve".