12001002122020 has 24 divisors (see below), whose sum is σ = 26071142542200. Its totient is φ = 4634869784832.

The previous prime is 12001002121967. The next prime is 12001002122063. The reversal of 12001002122020 is 2022120010021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 700271059684 + 11300731062336 = 836822^2 + 3361656^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10345690905 + ... + 10345692064.

It is an arithmetic number, because the mean of its divisors is an integer number (1086297605925).

Almost surely, 2^{12001002122020} is an apocalyptic number.

12001002122020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001002122020 is an abundant number, since it is smaller than the sum of its proper divisors (14070140420180).

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

12001002122020 is a wasteful number, since it uses less digits than its factorization.

12001002122020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20691383007 (or 20691383005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12001002122020 its reverse (2022120010021), we get a palindrome (14023122132041).

The spelling of 12001002122020 in words is "twelve trillion, one billion, two million, one hundred twenty-two thousand, twenty".