1321001001304 has 8 divisors (see below), whose sum is σ = 2476876877460. Its totient is φ = 660500500648.

The previous prime is 1321001001251. The next prime is 1321001001373. The reversal of 1321001001304 is 4031001001231.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 82562562574 + ... + 82562562589.

Almost surely, 2^{1321001001304} is an apocalyptic number.

It is an amenable number.

1321001001304 is a deficient number, since it is larger than the sum of its proper divisors (1155875876156).

1321001001304 is a wasteful number, since it uses less digits than its factorization.

1321001001304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165125125169 (or 165125125165 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1321001001304 its reverse (4031001001231), we get a palindrome (5352002002535).

The spelling of 1321001001304 in words is "one trillion, three hundred twenty-one billion, one million, one thousand, three hundred four".