212130312 has 32 divisors (see below), whose sum is σ = 530902080. Its totient is φ = 70633280.

The previous prime is 212130299. The next prime is 212130313. The reversal of 212130312 is 213031212.

It is a junction number, because it is equal to n+sod(n) for n = 212130291 and 212130300.

It is not an unprimeable number, because it can be changed into a prime (212130313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20458 + ... + 29030.

It is an arithmetic number, because the mean of its divisors is an integer number (16590690).

Almost surely, 2^212130312 is an apocalyptic number.

It is an amenable number.

212130312 is an abundant number, since it is smaller than the sum of its proper divisors (318771768).

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

212130312 is a wasteful number, since it uses less digits than its factorization.

212130312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613 (or 9609 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 212130312 is about 14564.6940235626. The cubic root of 212130312 is about 596.3953430033.

Adding to 212130312 its reverse (213031212), we get a palindrome (425161524).

The spelling of 212130312 in words is "two hundred twelve million, one hundred thirty thousand, three hundred twelve".