1200200002020 has 36 divisors (see below), whose sum is σ = 3640606673340. Its totient is φ = 320053333824.

The previous prime is 1200200002003. The next prime is 1200200002039. The reversal of 1200200002020 is 202000020021.

It can be written as a sum of positive squares in 2 ways, for example, as 141260215716 + 1058939786304 = 375846^2 + 1029048^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1200200001993 and 1200200002011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3333888715 + ... + 3333889074.

Almost surely, 2^{1200200002020} is an apocalyptic number.

1200200002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200200002020 is an abundant number, since it is smaller than the sum of its proper divisors (2440406671320).

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

1200200002020 is a wasteful number, since it uses less digits than its factorization.

1200200002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667777804 (or 6667777799 counting only the distinct ones).

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

Adding to 1200200002020 its reverse (202000020021), we get a palindrome (1402200022041).

The spelling of 1200200002020 in words is "one trillion, two hundred billion, two hundred million, two thousand, twenty".