8120211211 has 16 divisors (see below), whose sum is σ = 9834587136. Its totient is φ = 6545126016.

The previous prime is 8120211163. The next prime is 8120211221. The reversal of 8120211211 is 1121120218.

It is a cyclic number.

It is not a de Polignac number, because 8120211211 - 2²³ = 8111822603 is a prime.

It is a super-2 number, since 2×8120211211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112510 + ... + 169996.

It is an arithmetic number, because the mean of its divisors is an integer number (614661696).

Almost surely, 2^8120211211 is an apocalyptic number.

8120211211 is a deficient number, since it is larger than the sum of its proper divisors (1714375925).

8120211211 is a wasteful number, since it uses less digits than its factorization.

8120211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58698.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 8120211211 is about 90112.2145494161. The cubic root of 8120211211 is about 2009.9678394729.

Adding to 8120211211 its reverse (1121120218), we get a palindrome (9241331429).

The spelling of 8120211211 in words is "eight billion, one hundred twenty million, two hundred eleven thousand, two hundred eleven".