8121331218 has 64 divisors (see below), whose sum is σ = 21808346112. Its totient is φ = 1947170880.

The previous prime is 8121331201. The next prime is 8121331223.

8121331218 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×8121331218² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 670096 + ... + 682107.

It is an arithmetic number, because the mean of its divisors is an integer number (340755408).

Almost surely, 2^8121331218 is an apocalyptic number.

8121331218 is an abundant number, since it is smaller than the sum of its proper divisors (13687014894).

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

8121331218 is a wasteful number, since it uses less digits than its factorization.

8121331218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352239.

The product of its digits is 2304, while the sum is 30.

The square root of 8121331218 is about 90118.4288478222. The cubic root of 8121331218 is about 2010.0602457129.

The spelling of 8121331218 in words is "eight billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred eighteen".