1200200020 has 12 divisors (see below), whose sum is σ = 2520420084. Its totient is φ = 480080000.

The previous prime is 1200199997. The next prime is 1200200021. The reversal of 1200200020 is 200020021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 905528464 + 294671556 = 30092^2 + 17166^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1200199976 and 1200200012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200200021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30004981 + ... + 30005020.

It is an arithmetic number, because the mean of its divisors is an integer number (210035007).

Almost surely, 2^1200200020 is an apocalyptic number.

1200200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200200020 is an abundant number, since it is smaller than the sum of its proper divisors (1320220064).

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

1200200020 is a wasteful number, since it uses less digits than its factorization.

1200200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60010010 (or 60010008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1200200020 is about 34643.9030711033. The cubic root of 1200200020 is about 1062.7176083933.

Adding to 1200200020 its reverse (200020021), we get a palindrome (1400220041).

The spelling of 1200200020 in words is "one billion, two hundred million, two hundred thousand, twenty".