1321343443004 has 24 divisors (see below), whose sum is σ = 2490302031168. Its totient is φ = 609831754560.

The previous prime is 1321343442967. The next prime is 1321343443009. The reversal of 1321343443004 is 4003443431231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321343443009) 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 7 ways as a sum of consecutive naturals, for example, 1355834 + ... + 2116830.

It is an arithmetic number, because the mean of its divisors is an integer number (103762584632).

Almost surely, 2^{1321343443004} is an apocalyptic number.

It is an amenable number.

1321343443004 is a deficient number, since it is larger than the sum of its proper divisors (1168958588164).

1321343443004 is a wasteful number, since it uses less digits than its factorization.

1321343443004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794405 (or 794403 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1321343443004 its reverse (4003443431231), we get a palindrome (5324786874235).

The spelling of 1321343443004 in words is "one trillion, three hundred twenty-one billion, three hundred forty-three million, four hundred forty-three thousand, four".