212105412 has 48 divisors (see below), whose sum is σ = 562703680. Its totient is φ = 69056064.

The previous prime is 212105401. The next prime is 212105419. The reversal of 212105412 is 214501212.

212105412 is a `hidden beast` number, since 2 + 121 + 0 + 541 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212105419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18193 + ... + 27480.

Almost surely, 2^212105412 is an apocalyptic number.

It is an amenable number.

212105412 is an abundant number, since it is smaller than the sum of its proper divisors (350598268).

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

212105412 is a wasteful number, since it uses less digits than its factorization.

212105412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45729 (or 45721 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 212105412 is about 14563.8391916417. The cubic root of 212105412 is about 596.3720069935.

Adding to 212105412 its reverse (214501212), we get a palindrome (426606624).

The spelling of 212105412 in words is "two hundred twelve million, one hundred five thousand, four hundred twelve".