1312231321332 has 72 divisors (see below), whose sum is σ = 3431667624840. Its totient is φ = 422295552000.

The previous prime is 1312231321321. The next prime is 1312231321333. The reversal of 1312231321332 is 2331231322131.

1312231321332 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 2 + 3 + 1 + 321 + 332 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 172196781156 + 1140034540176 = 414966^2 + 1067724^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1312231321296 and 1312231321305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312231321333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16665768 + ... + 16744320.

It is an arithmetic number, because the mean of its divisors is an integer number (47662050345).

Almost surely, 2^{1312231321332} is an apocalyptic number.

1312231321332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312231321332 is an abundant number, since it is smaller than the sum of its proper divisors (2119436303508).

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

1312231321332 is a wasteful number, since it uses less digits than its factorization.

1312231321332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94593 (or 94588 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1312231321332 its reverse (2331231322131), we get a palindrome (3643462643463).

The spelling of 1312231321332 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, three hundred twenty-one thousand, three hundred thirty-two".