8121222221218 has 8 divisors (see below), whose sum is σ = 12182928952320. Its totient is φ = 4060245903780.

The previous prime is 8121222221209. The next prime is 8121222221239.

8121222221218 is nontrivially palindromic in base 10.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182575618 + ... + 182620093.

It is an arithmetic number, because the mean of its divisors is an integer number (1522866119040).

Almost surely, 2^{8121222221218} is an apocalyptic number.

8121222221218 is a deficient number, since it is larger than the sum of its proper divisors (4061706731102).

8121222221218 is a wasteful number, since it uses less digits than its factorization.

8121222221218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365206832.

The product of its digits is 8192, while the sum is 34.

The spelling of 8121222221218 in words is "eight trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred eighteen".