1321443326412 has 72 divisors (see below), whose sum is σ = 3644350557120. Its totient is φ = 400396660320.

The previous prime is 1321443326363. The next prime is 1321443326417. The reversal of 1321443326412 is 2146233441231.

1321443326412 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 4 + 4 + 3 + 3 + 2 + 641 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is not an unprimeable number, because it can be changed into a prime (1321443326417) 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, 3850483 + ... + 4179605.

It is an arithmetic number, because the mean of its divisors is an integer number (50615979960).

Almost surely, 2^{1321443326412} is an apocalyptic number.

1321443326412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321443326412 is an abundant number, since it is smaller than the sum of its proper divisors (2322907230708).

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

1321443326412 is a wasteful number, since it uses less digits than its factorization.

1321443326412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339283 (or 339278 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

Adding to 1321443326412 its reverse (2146233441231), we get a palindrome (3467676767643).

The spelling of 1321443326412 in words is "one trillion, three hundred twenty-one billion, four hundred forty-three million, three hundred twenty-six thousand, four hundred twelve".