1312302321 has 12 divisors (see below), whose sum is σ = 2067870480. Its totient is φ = 795334680.

The previous prime is 1312302319. The next prime is 1312302331. The reversal of 1312302321 is 1232032131.

1312302321 is a `hidden beast` number, since 1 + 312 + 30 + 2 + 321 = 666.

It is not a de Polignac number, because 1312302321 - 2¹ = 1312302319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1312302294 and 1312302303.

It is not an unprimeable number, because it can be changed into a prime (1312302311) 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, 6627691 + ... + 6627888.

It is an arithmetic number, because the mean of its divisors is an integer number (172322540).

Almost surely, 2^1312302321 is an apocalyptic number.

1312302321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312302321 is a deficient number, since it is larger than the sum of its proper divisors (755568159).

1312302321 is a wasteful number, since it uses less digits than its factorization.

1312302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13255596 (or 13255593 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312302321 is about 36225.7135333453. The cubic root of 1312302321 is about 1094.8248146589.

Adding to 1312302321 its reverse (1232032131), we get a palindrome (2544334452).

The spelling of 1312302321 in words is "one billion, three hundred twelve million, three hundred two thousand, three hundred twenty-one".