1312333321 has 8 divisors (see below), whose sum is σ = 1436451464. Its totient is φ = 1191525120.

The previous prime is 1312333307. The next prime is 1312333331. The reversal of 1312333321 is 1233332131.

It can be written as a sum of positive squares in 4 ways, for example, as 66243321 + 1246090000 = 8139^2 + 35300^2 .

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 1312333321 - 2⁹ = 1312332809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312333292 and 1312333301.

It is not an unprimeable number, because it can be changed into a prime (1312333301) 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, 826656 + ... + 828241.

It is an arithmetic number, because the mean of its divisors is an integer number (179556433).

Almost surely, 2^1312333321 is an apocalyptic number.

It is an amenable number.

1312333321 is a deficient number, since it is larger than the sum of its proper divisors (124118143).

1312333321 is a wasteful number, since it uses less digits than its factorization.

1312333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654971.

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

The square root of 1312333321 is about 36226.1414036880. The cubic root of 1312333321 is about 1094.8334354625.

Adding to 1312333321 its reverse (1233332131), we get a palindrome (2545665452).

The spelling of 1312333321 in words is "one billion, three hundred twelve million, three hundred thirty-three thousand, three hundred twenty-one".