1311301321 has 12 divisors (see below), whose sum is σ = 1517210800. Its totient is φ = 1129348440.

The previous prime is 1311301301. The next prime is 1311301331. The reversal of 1311301321 is 1231031131.

It is not a de Polignac number, because 1311301321 - 2²⁵ = 1277746889 is a prime.

It is a super-2 number, since 2×1311301321² = 3439022308912690082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311301295 and 1311301304.

It is not an unprimeable number, because it can be changed into a prime (1311301301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282891 + ... + 287488.

Almost surely, 2^1311301321 is an apocalyptic number.

1311301321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1311301321 is a deficient number, since it is larger than the sum of its proper divisors (205909479).

1311301321 is a wasteful number, since it uses less digits than its factorization.

1311301321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570420 (or 570409 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1311301321 is about 36211.8947446830. The cubic root of 1311301321 is about 1094.5463731267.

Adding to 1311301321 its reverse (1231031131), we get a palindrome (2542332452).

The spelling of 1311301321 in words is "one billion, three hundred eleven million, three hundred one thousand, three hundred twenty-one".