212012004 has 24 divisors (see below), whose sum is σ = 495240480. Its totient is φ = 70592704.

The previous prime is 212011993. The next prime is 212012033. The reversal of 212012004 is 400210212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 2167 + ... + 20705.

It is an arithmetic number, because the mean of its divisors is an integer number (20635020).

Almost surely, 2^212012004 is an apocalyptic number.

It is an amenable number.

212012004 is an abundant number, since it is smaller than the sum of its proper divisors (283228476).

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

212012004 is a wasteful number, since it uses less digits than its factorization.

212012004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19499 (or 19497 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 212012004 is about 14560.6319917784. The cubic root of 212012004 is about 596.2844497498.

Adding to 212012004 its reverse (400210212), we get a palindrome (612222216).

The spelling of 212012004 in words is "two hundred twelve million, twelve thousand, four".