8121131112 has 32 divisors (see below), whose sum is σ = 20559830400. Its totient is φ = 2672776704.

The previous prime is 8121131063. The next prime is 8121131131. The reversal of 8121131112 is 2111311218.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2139753 + ... + 2143544.

It is an arithmetic number, because the mean of its divisors is an integer number (642494700).

Almost surely, 2^8121131112 is an apocalyptic number.

It is an amenable number.

8121131112 is an abundant number, since it is smaller than the sum of its proper divisors (12438699288).

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

8121131112 is a wasteful number, since it uses less digits than its factorization.

8121131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283385 (or 4283381 counting only the distinct ones).

The product of its digits is 96, while the sum is 21.

The square root of 8121131112 is about 90117.3186019202. The cubic root of 8121131112 is about 2010.0437365796.

The spelling of 8121131112 in words is "eight billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred twelve".