1200221012000 has 96 divisors (see below), whose sum is σ = 3122410440240. Its totient is φ = 451847884800.

The previous prime is 1200221011961. The next prime is 1200221012041. The reversal of 1200221012000 is 2101220021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 272905939216 + 927315072784 = 522404^2 + 962972^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8757155 + ... + 8893154.

Almost surely, 2^{1200221012000} is an apocalyptic number.

1200221012000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200221012000 is an abundant number, since it is smaller than the sum of its proper divisors (1922189428240).

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

1200221012000 is a wasteful number, since it uses less digits than its factorization.

1200221012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17650351 (or 17650333 counting only the distinct ones).

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

Adding to 1200221012000 its reverse (2101220021), we get a palindrome (1202322232021).

The spelling of 1200221012000 in words is "one trillion, two hundred billion, two hundred twenty-one million, twelve thousand".