212340012 has 12 divisors (see below), whose sum is σ = 495460056. Its totient is φ = 70780000.

The previous prime is 212339983. The next prime is 212340017. The reversal of 212340012 is 210043212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 212339973 and 212340000.

It is not an unprimeable number, because it can be changed into a prime (212340017) 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 3 ways as a sum of consecutive naturals, for example, 8847489 + ... + 8847512.

It is an arithmetic number, because the mean of its divisors is an integer number (41288338).

Almost surely, 2^212340012 is an apocalyptic number.

It is an amenable number.

212340012 is an abundant number, since it is smaller than the sum of its proper divisors (283120044).

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

212340012 is a wasteful number, since it uses less digits than its factorization.

212340012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17695008 (or 17695006 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 212340012 is about 14571.8911607245. The cubic root of 212340012 is about 596.5917991571.

Adding to 212340012 its reverse (210043212), we get a palindrome (422383224).

The spelling of 212340012 in words is "two hundred twelve million, three hundred forty thousand, twelve".