1321230313200 has 240 divisors, whose sum is σ = 4837999602176. Its totient is φ = 301930675200.

The previous prime is 1321230313199. The next prime is 1321230313307. The reversal of 1321230313200 is 23130321231.

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 (21).

It is a congruent number.

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, 46866309 + ... + 46894491.

Almost surely, 2^{1321230313200} is an apocalyptic number.

1321230313200 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 1321230313200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2418999801088).

1321230313200 is an abundant number, since it is smaller than the sum of its proper divisors (3516769288976).

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

1321230313200 is a wasteful number, since it uses less digits than its factorization.

1321230313200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33792 (or 33781 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1321230313200 its reverse (23130321231), we get a palindrome (1344360634431).

The spelling of 1321230313200 in words is "one trillion, three hundred twenty-one billion, two hundred thirty million, three hundred thirteen thousand, two hundred".