1321111310200 has 192 divisors, whose sum is σ = 3386724307200. Its totient is φ = 475265817600.

The previous prime is 1321111310191. The next prime is 1321111310203. The reversal of 1321111310200 is 20131111231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321111310203) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 292085139 + ... + 292089661.

It is an arithmetic number, because the mean of its divisors is an integer number (17639189100).

Almost surely, 2^{1321111310200} is an apocalyptic number.

1321111310200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321111310200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693362153600).

1321111310200 is an abundant number, since it is smaller than the sum of its proper divisors (2065612997000).

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

1321111310200 is a wasteful number, since it uses less digits than its factorization.

1321111310200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1321111310200 its reverse (20131111231), we get a palindrome (1341242421431).

The spelling of 1321111310200 in words is "one trillion, three hundred twenty-one billion, one hundred eleven million, three hundred ten thousand, two hundred".