1321144320412 has 36 divisors (see below), whose sum is σ = 2723516352480. Its totient is φ = 559037553984.

The previous prime is 1321144320409. The next prime is 1321144320421. The reversal of 1321144320412 is 2140234411231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

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, 42646113 + ... + 42677080.

Almost surely, 2^{1321144320412} is an apocalyptic number.

It is an amenable number.

1321144320412 is an abundant number, since it is smaller than the sum of its proper divisors (1402372032068).

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

1321144320412 is a wasteful number, since it uses less digits than its factorization.

1321144320412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85323290 (or 85323281 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 1321144320412 its reverse (2140234411231), we get a palindrome (3461378731643).

The spelling of 1321144320412 in words is "one trillion, three hundred twenty-one billion, one hundred forty-four million, three hundred twenty thousand, four hundred twelve".