1312232321 has 8 divisors (see below), whose sum is σ = 1381927200. Its totient is φ = 1242600480.

The previous prime is 1312232297. The next prime is 1312232357. The reversal of 1312232321 is 1232322131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312232321 - 2²⁶ = 1245123457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1312232293 and 1312232302.

It is not an unprimeable number, because it can be changed into a prime (1312232381) 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, 30485 + ... + 59613.

It is an arithmetic number, because the mean of its divisors is an integer number (172740900).

Almost surely, 2^1312232321 is an apocalyptic number.

It is an amenable number.

1312232321 is a deficient number, since it is larger than the sum of its proper divisors (69694879).

1312232321 is a wasteful number, since it uses less digits than its factorization.

1312232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31519.

The product of its digits is 432, while the sum is 20.

The square root of 1312232321 is about 36224.7473559168. The cubic root of 1312232321 is about 1094.8053478286.

Adding to 1312232321 its reverse (1232322131), we get a palindrome (2544554452).

The spelling of 1312232321 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, three hundred twenty-one".