1321468321 has 2 divisors, whose sum is σ = 1321468322. Its totient is φ = 1321468320.

The previous prime is 1321468319. The next prime is 1321468363. The reversal of 1321468321 is 1238641231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1287374400 + 34093921 = 35880^2 + 5839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321468321 - 2¹ = 1321468319 is a prime.

Together with 1321468319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321468301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660734160 + 660734161.

It is an arithmetic number, because the mean of its divisors is an integer number (660734161).

Almost surely, 2^1321468321 is an apocalyptic number.

It is an amenable number.

1321468321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321468321 is an equidigital number, since it uses as much as digits as its factorization.

1321468321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 1321468321 is about 36352.0057355849. The cubic root of 1321468321 is about 1097.3678999996.

The spelling of 1321468321 in words is "one billion, three hundred twenty-one million, four hundred sixty-eight thousand, three hundred twenty-one".