1200002021200 has 30 divisors (see below), whose sum is σ = 2883004856894. Its totient is φ = 480000808320.

The previous prime is 1200002021171. The next prime is 1200002021233. The reversal of 1200002021200 is 21202000021.

It can be written as a sum of positive squares in 3 ways, for example, as 78969992256 + 1121032028944 = 281016^2 + 1058788^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1500002127 + ... + 1500002926.

Almost surely, 2^{1200002021200} is an apocalyptic number.

1200002021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200002021200 is an abundant number, since it is smaller than the sum of its proper divisors (1683002835694).

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

1200002021200 is a wasteful number, since it uses less digits than its factorization.

1200002021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000005071 (or 3000005060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1200002021200 its reverse (21202000021), we get a palindrome (1221204021221).

The spelling of 1200002021200 in words is "one trillion, two hundred billion, two million, twenty-one thousand, two hundred".