8212171212 has 36 divisors (see below), whose sum is σ = 23724050896. Its totient is φ = 2346334560.

The previous prime is 8212171199. The next prime is 8212171213. The reversal of 8212171212 is 2121712128.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (8212171213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16293739 + ... + 16294242.

Almost surely, 2^8212171212 is an apocalyptic number.

It is an amenable number.

8212171212 is an abundant number, since it is smaller than the sum of its proper divisors (15511879684).

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

8212171212 is a wasteful number, since it uses less digits than its factorization.

8212171212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32587998 (or 32587993 counting only the distinct ones).

The product of its digits is 896, while the sum is 27.

The square root of 8212171212 is about 90621.0307379032. The cubic root of 8212171212 is about 2017.5268897251.

The spelling of 8212171212 in words is "eight billion, two hundred twelve million, one hundred seventy-one thousand, two hundred twelve".