12001020020 has 48 divisors (see below), whose sum is σ = 28012013568. Its totient is φ = 4281663360.

The previous prime is 12001020019. The next prime is 12001020071. The reversal of 12001020020 is 2002010021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502964 + ... + 526283.

It is an arithmetic number, because the mean of its divisors is an integer number (583583616).

Almost surely, 2^12001020020 is an apocalyptic number.

12001020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001020020 is an abundant number, since it is smaller than the sum of its proper divisors (16010993548).

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

12001020020 is a wasteful number, since it uses less digits than its factorization.

12001020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029320 (or 1029318 counting only the distinct ones).

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

Adding to 12001020020 its reverse (2002010021), we get a palindrome (14003030041).

Subtracting from 12001020020 its reverse (2002010021), we obtain a palindrome (9999009999).

The spelling of 12001020020 in words is "twelve billion, one million, twenty thousand, twenty".