1323120321007 has 4 divisors (see below), whose sum is σ = 1323162663696. Its totient is φ = 1323077978320.

The previous prime is 1323120321001. The next prime is 1323120321011. The reversal of 1323120321007 is 7001230213231.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323120321007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323120321001) 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, 21124438 + ... + 21186979.

It is an arithmetic number, because the mean of its divisors is an integer number (330790665924).

Almost surely, 2^{1323120321007} is an apocalyptic number.

1323120321007 is a deficient number, since it is larger than the sum of its proper divisors (42342689).

1323120321007 is an equidigital number, since it uses as much as digits as its factorization.

1323120321007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42342688.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 1323120321007 its reverse (7001230213231), we get a palindrome (8324350534238).

The spelling of 1323120321007 in words is "one trillion, three hundred twenty-three billion, one hundred twenty million, three hundred twenty-one thousand, seven".