1321303031320 has 32 divisors (see below), whose sum is σ = 2973111354000. Its totient is φ = 528489295488.

The previous prime is 1321303031317. The next prime is 1321303031341. The reversal of 1321303031320 is 231303031231.

It is a junction number, because it is equal to n+sod(n) for n = 1321303031291 and 1321303031300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321099 + ... + 1657018.

Almost surely, 2^{1321303031320} is an apocalyptic number.

1321303031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321303031320 is an abundant number, since it is smaller than the sum of its proper divisors (1651808322680).

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

1321303031320 is a wasteful number, since it uses less digits than its factorization.

1321303031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994827 (or 1994823 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 1321303031320 its reverse (231303031231), we get a palindrome (1552606062551).

The spelling of 1321303031320 in words is "one trillion, three hundred twenty-one billion, three hundred three million, thirty-one thousand, three hundred twenty".