8212171211 has 8 divisors (see below), whose sum is σ = 8299095360. Its totient is φ = 8125685568.

The previous prime is 8212171199. The next prime is 8212171213. The reversal of 8212171211 is 1121712128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8212171211 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 71906 + ... + 146951.

It is an arithmetic number, because the mean of its divisors is an integer number (1037386920).

Almost surely, 2^8212171211 is an apocalyptic number.

8212171211 is a deficient number, since it is larger than the sum of its proper divisors (86924149).

8212171211 is a wasteful number, since it uses less digits than its factorization.

8212171211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219253.

The product of its digits is 448, while the sum is 26.

The square root of 8212171211 is about 90621.0307323857. The cubic root of 8212171211 is about 2017.5268896432.

Adding to 8212171211 its reverse (1121712128), we get a palindrome (9333883339).

The spelling of 8212171211 in words is "eight billion, two hundred twelve million, one hundred seventy-one thousand, two hundred eleven".