1201200021200 has 30 divisors (see below), whose sum is σ = 2885883051894. Its totient is φ = 480480008320.

The previous prime is 1201200021191. The next prime is 1201200021221. The reversal of 1201200021200 is 21200021021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 457446544 + 1200742574656 = 21388^2 + 1095784^2 .

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, 1501499627 + ... + 1501500426.

Almost surely, 2^{1201200021200} is an apocalyptic number.

1201200021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201200021200 is an abundant number, since it is smaller than the sum of its proper divisors (1684683030694).

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

1201200021200 is a wasteful number, since it uses less digits than its factorization.

1201200021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003000071 (or 3003000060 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1201200021200 its reverse (21200021021), we get a palindrome (1222400042221).

The spelling of 1201200021200 in words is "one trillion, two hundred one billion, two hundred million, twenty-one thousand, two hundred".