12002200020 has 144 divisors (see below), whose sum is σ = 36955835280. Its totient is φ = 3152590848.

The previous prime is 12002199991. The next prime is 12002200061. The reversal of 12002200020 is 2000220021.

It can be written as a sum of positive squares in 8 ways, for example, as 121104 + 12002078916 = 348^2 + 109554^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 12002199975 and 12002200011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4692582 + ... + 4695138.

It is an arithmetic number, because the mean of its divisors is an integer number (256637745).

Almost surely, 2^12002200020 is an apocalyptic number.

12002200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12002200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18477917640).

12002200020 is an abundant number, since it is smaller than the sum of its proper divisors (24953635260).

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

12002200020 is a wasteful number, since it uses less digits than its factorization.

12002200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2954 (or 2949 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 12002200020 its reverse (2000220021), we get a palindrome (14002420041).

The spelling of 12002200020 in words is "twelve billion, two million, two hundred thousand, twenty".