1002320121323 has 4 divisors (see below), whose sum is σ = 1005208652280. Its totient is φ = 999431590368.

The previous prime is 1002320121293. The next prime is 1002320121409. The reversal of 1002320121323 is 3231210232001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002320121323 - 2⁸ = 1002320121067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002320121295 and 1002320121304.

It is not an unprimeable number, because it can be changed into a prime (1002320121623) 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, 1444264958 + ... + 1444265651.

It is an arithmetic number, because the mean of its divisors is an integer number (251302163070).

Almost surely, 2^{1002320121323} is an apocalyptic number.

1002320121323 is a deficient number, since it is larger than the sum of its proper divisors (2888530957).

1002320121323 is an equidigital number, since it uses as much as digits as its factorization.

1002320121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888530956.

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

Adding to 1002320121323 its reverse (3231210232001), we get a palindrome (4233530353324).

The spelling of 1002320121323 in words is "one trillion, two billion, three hundred twenty million, one hundred twenty-one thousand, three hundred twenty-three".