12001002020 has 48 divisors (see below), whose sum is σ = 28869068928. Its totient is φ = 4105105920.

The previous prime is 12001002019. The next prime is 12001002029. The reversal of 12001002020 is 2020010021.

It is a junction number, because it is equal to n+sod(n) for n = 12001001989 and 12001002007.

It is not an unprimeable number, because it can be changed into a prime (12001002029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38366 + ... + 159605.

It is an arithmetic number, because the mean of its divisors is an integer number (601438936).

Almost surely, 2^12001002020 is an apocalyptic number.

12001002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001002020 is an abundant number, since it is smaller than the sum of its proper divisors (16868066908).

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

12001002020 is a wasteful number, since it uses less digits than its factorization.

12001002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198420 (or 198418 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 12001002020 its reverse (2020010021), we get a palindrome (14021012041).

The spelling of 12001002020 in words is "twelve billion, one million, two thousand, twenty".