212134404 has 12 divisors (see below), whose sum is σ = 494980304. Its totient is φ = 70711464.

The previous prime is 212134399. The next prime is 212134409. The reversal of 212134404 is 404431212.

It is an interprime number because it is at equal distance from previous prime (212134399) and next prime (212134409).

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

It is not an unprimeable number, because it can be changed into a prime (212134409) 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, 8838922 + ... + 8838945.

Almost surely, 2^212134404 is an apocalyptic number.

It is an amenable number.

212134404 is an abundant number, since it is smaller than the sum of its proper divisors (282845900).

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

212134404 is a wasteful number, since it uses less digits than its factorization.

212134404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17677874 (or 17677872 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 212134404 is about 14564.8344995747. The cubic root of 212134404 is about 596.3991778066.

Adding to 212134404 its reverse (404431212), we get a palindrome (616565616).

The spelling of 212134404 in words is "two hundred twelve million, one hundred thirty-four thousand, four hundred four".