12001122210020 has 24 divisors (see below), whose sum is σ = 25202790252024. Its totient is φ = 4800366291456.

The previous prime is 12001122210013. The next prime is 12001122210037. The reversal of 12001122210020 is 2001222110021.

It can be written as a sum of positive squares in 4 ways, for example, as 1773867041956 + 10227255168064 = 1331866^2 + 3198008^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12001122209977 and 12001122210004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3963749 + ... + 6301868.

It is an arithmetic number, because the mean of its divisors is an integer number (1050116260501).

Almost surely, 2^{12001122210020} is an apocalyptic number.

12001122210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001122210020 is an abundant number, since it is smaller than the sum of its proper divisors (13201668042004).

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

12001122210020 is a wasteful number, since it uses less digits than its factorization.

12001122210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10324079 (or 10324077 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12001122210020 its reverse (2001222110021), we get a palindrome (14002344320041).

Subtracting from 12001122210020 its reverse (2001222110021), we obtain a palindrome (9999900099999).

The spelling of 12001122210020 in words is "twelve trillion, one billion, one hundred twenty-two million, two hundred ten thousand, twenty".