1155321230000 has 200 divisors, whose sum is σ = 3241779298560. Its totient is φ = 390529440000.

The previous prime is 1155321229991. The next prime is 1155321230047. The reversal of 1155321230000 is 321235511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (200).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4853771 + ... + 5086229.

Almost surely, 2^{1155321230000} is an apocalyptic number.

1155321230000 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 1155321230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620889649280).

1155321230000 is an abundant number, since it is smaller than the sum of its proper divisors (2086458068560).

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

1155321230000 is an equidigital number, since it uses as much as digits as its factorization.

1155321230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232565 (or 232544 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 1155321230000 its reverse (321235511), we get a palindrome (1155642465511).

The spelling of 1155321230000 in words is "one trillion, one hundred fifty-five billion, three hundred twenty-one million, two hundred thirty thousand".