1331020321304 has 32 divisors (see below), whose sum is σ = 2543463659520. Its totient is φ = 652770383616.

The previous prime is 1331020321303. The next prime is 1331020321313. The reversal of 1331020321304 is 4031230201331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331020321304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331020321303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081124 + ... + 1957260.

It is an arithmetic number, because the mean of its divisors is an integer number (79483239360).

Almost surely, 2^{1331020321304} is an apocalyptic number.

It is an amenable number.

1331020321304 is a deficient number, since it is larger than the sum of its proper divisors (1212443338216).

1331020321304 is a wasteful number, since it uses less digits than its factorization.

1331020321304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879779 (or 879775 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1331020321304 its reverse (4031230201331), we get a palindrome (5362250522635).

The spelling of 1331020321304 in words is "one trillion, three hundred thirty-one billion, twenty million, three hundred twenty-one thousand, three hundred four".