8211381222 has 32 divisors (see below), whose sum is σ = 18332392320. Its totient is φ = 2430429120.

The previous prime is 8211381203. The next prime is 8211381229. The reversal of 8211381222 is 2221831128.

It is a self number, because there is not a number n which added to its sum of digits gives 8211381222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8211381229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1443847 + ... + 1449522.

It is an arithmetic number, because the mean of its divisors is an integer number (572887260).

Almost surely, 2^8211381222 is an apocalyptic number.

8211381222 is an abundant number, since it is smaller than the sum of its proper divisors (10121011098).

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

8211381222 is a wasteful number, since it uses less digits than its factorization.

8211381222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893428.

The product of its digits is 3072, while the sum is 30.

The square root of 8211381222 is about 90616.6718766475. The cubic root of 8211381222 is about 2017.4621939974.

The spelling of 8211381222 in words is "eight billion, two hundred eleven million, three hundred eighty-one thousand, two hundred twenty-two".