1321312333200 has 240 divisors, whose sum is σ = 4298034152256. Its totient is φ = 346908672000.

The previous prime is 1321312333151. The next prime is 1321312333223. The reversal of 1321312333200 is 23332131231.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227770300 + ... + 227776100.

Almost surely, 2^{1321312333200} is an apocalyptic number.

1321312333200 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 1321312333200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2149017076128).

1321312333200 is an abundant number, since it is smaller than the sum of its proper divisors (2976721819056).

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

1321312333200 is a wasteful number, since it uses less digits than its factorization.

1321312333200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8722 (or 8711 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 1321312333200 its reverse (23332131231), we get a palindrome (1344644464431).

The spelling of 1321312333200 in words is "one trillion, three hundred twenty-one billion, three hundred twelve million, three hundred thirty-three thousand, two hundred".