1312321330 has 8 divisors (see below), whose sum is σ = 2362178412. Its totient is φ = 524928528.

The previous prime is 1312321321. The next prime is 1312321333. The reversal of 1312321330 is 331232131.

It can be written as a sum of positive squares in 2 ways, for example, as 1256206249 + 56115081 = 35443^2 + 7491^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1312321298 and 1312321307.

It is not an unprimeable number, because it can be changed into a prime (1312321333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65616057 + ... + 65616076.

Almost surely, 2^1312321330 is an apocalyptic number.

1312321330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312321330 is a deficient number, since it is larger than the sum of its proper divisors (1049857082).

1312321330 is a wasteful number, since it uses less digits than its factorization.

1312321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131232140.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1312321330 is about 36225.9759012784. The cubic root of 1312321330 is about 1094.8301008962.

Adding to 1312321330 its reverse (331232131), we get a palindrome (1643553461).

It can be divided in two parts, 13123 and 21330, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 1312321330 in words is "one billion, three hundred twelve million, three hundred twenty-one thousand, three hundred thirty".