1323231202009 has 8 divisors (see below), whose sum is σ = 1348217566920. Its totient is φ = 1298245568256.

The previous prime is 1323231202001. The next prime is 1323231202067. The reversal of 1323231202009 is 9002021323231.

It can be written as a sum of positive squares in 4 ways, for example, as 508775491225 + 814455710784 = 713285^2 + 902472^2 .

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 1323231202009 - 2³ = 1323231202001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323231202001) 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, 4681297 + ... + 4955905.

It is an arithmetic number, because the mean of its divisors is an integer number (168527195865).

Almost surely, 2^{1323231202009} is an apocalyptic number.

It is an amenable number.

1323231202009 is a deficient number, since it is larger than the sum of its proper divisors (24986364911).

1323231202009 is an equidigital number, since it uses as much as digits as its factorization.

1323231202009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365579.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 1323231202009 in words is "one trillion, three hundred twenty-three billion, two hundred thirty-one million, two hundred two thousand, nine".