212105012 has 12 divisors (see below), whose sum is σ = 424210080. Its totient is φ = 90902136.

The previous prime is 212105009. The next prime is 212105021. The reversal of 212105012 is 210501212.

212105012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

212105012 is an admirable number.

It is a super-2 number, since 2×212105012² = 89977072231040288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3787562 + ... + 3787617.

It is an arithmetic number, because the mean of its divisors is an integer number (35350840).

Almost surely, 2^212105012 is an apocalyptic number.

It is an amenable number.

212105012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

212105012 is a wasteful number, since it uses less digits than its factorization.

212105012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7575190 (or 7575188 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 212105012 is about 14563.8254589926. The cubic root of 212105012 is about 596.3716321029.

Adding to 212105012 its reverse (210501212), we get a palindrome (422606224).

The spelling of 212105012 in words is "two hundred twelve million, one hundred five thousand, twelve".