212004135 has 84 divisors (see below), whose sum is σ = 444081528. Its totient is φ = 96834528.

The previous prime is 212004101. The next prime is 212004139. The reversal of 212004135 is 531400212.

It is not a de Polignac number, because 212004135 - 2¹⁰ = 212003111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212004139) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 178012 + ... + 179198.

Almost surely, 2^212004135 is an apocalyptic number.

212004135 is an abundant number, since it is smaller than the sum of its proper divisors (232077393).

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

212004135 is an equidigital number, since it uses as much as digits as its factorization.

212004135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212004135 is about 14560.3617743516. The cubic root of 212004135 is about 596.2770724625.

Adding to 212004135 its reverse (531400212), we get a palindrome (743404347).

The spelling of 212004135 in words is "two hundred twelve million, four thousand, one hundred thirty-five".