1311232311200 has 72 divisors (see below), whose sum is σ = 3658338163872. Its totient is φ = 449565361920.

The previous prime is 1311232311163. The next prime is 1311232311209. The reversal of 1311232311200 is 21132321131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1311232311209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117068714 + ... + 117079913.

It is an arithmetic number, because the mean of its divisors is an integer number (50810252276).

Almost surely, 2^{1311232311200} is an apocalyptic number.

1311232311200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311232311200 is an abundant number, since it is smaller than the sum of its proper divisors (2347105852672).

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

1311232311200 is a wasteful number, since it uses less digits than its factorization.

1311232311200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234148654 (or 234148641 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1311232311200 its reverse (21132321131), we get a palindrome (1332364632331).

The spelling of 1311232311200 in words is "one trillion, three hundred eleven billion, two hundred thirty-two million, three hundred eleven thousand, two hundred".