12001200020 has 12 divisors (see below), whose sum is σ = 25202520084. Its totient is φ = 4800480000.

The previous prime is 12001200017. The next prime is 12001200037. The reversal of 12001200020 is 2000210021.

It can be written as a sum of positive squares in 2 ways, for example, as 6358786564 + 5642413456 = 79742^2 + 75116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12001199980 and 12001200007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300029981 + ... + 300030020.

It is an arithmetic number, because the mean of its divisors is an integer number (2100210007).

Almost surely, 2^12001200020 is an apocalyptic number.

12001200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001200020 is an abundant number, since it is smaller than the sum of its proper divisors (13201320064).

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

12001200020 is a wasteful number, since it uses less digits than its factorization.

12001200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600060010 (or 600060008 counting only the distinct ones).

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

Adding to 12001200020 its reverse (2000210021), we get a palindrome (14001410041).

The spelling of 12001200020 in words is "twelve billion, one million, two hundred thousand, twenty".