20001222120012 has 96 divisors (see below), whose sum is σ = 55661398044672. Its totient is φ = 5465600559936.

The previous prime is 20001222119947. The next prime is 20001222120017. The reversal of 20001222120012 is 21002122210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001222119973 and 20001222120000.

It is not an unprimeable number, because it can be changed into a prime (20001222120017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18093483 + ... + 19167069.

It is an arithmetic number, because the mean of its divisors is an integer number (579806229632).

Almost surely, 2^{20001222120012} is an apocalyptic number.

It is an amenable number.

20001222120012 is an abundant number, since it is smaller than the sum of its proper divisors (35660175924660).

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

20001222120012 is a wasteful number, since it uses less digits than its factorization.

20001222120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083267 (or 1083265 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20001222120012 its reverse (21002122210002), we get a palindrome (41003344330014).

The spelling of 20001222120012 in words is "twenty trillion, one billion, two hundred twenty-two million, one hundred twenty thousand, twelve".