1001222220018 has 16 divisors (see below), whose sum is σ = 2002556392416. Its totient is φ = 333722081280.

The previous prime is 1001222220017. The next prime is 1001222220067. The reversal of 1001222220018 is 8100222221001.

It is a junction number, because it is equal to n+sod(n) for n = 1001222219976 and 1001222220003.

It is not an unprimeable number, because it can be changed into a prime (1001222220017) 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 7 ways as a sum of consecutive naturals, for example, 4548196 + ... + 4763247.

It is an arithmetic number, because the mean of its divisors is an integer number (125159774526).

Almost surely, 2^{1001222220018} is an apocalyptic number.

1001222220018 is an abundant number, since it is smaller than the sum of its proper divisors (1001334172398).

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

1001222220018 is a wasteful number, since it uses less digits than its factorization.

1001222220018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9329369.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 1001222220018 its reverse (8100222221001), we get a palindrome (9101444441019).

The spelling of 1001222220018 in words is "one trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, eighteen".