1323111320321 has 16 divisors (see below), whose sum is σ = 1514698313088. Its totient is φ = 1132168752000.

The previous prime is 1323111320273. The next prime is 1323111320369. The reversal of 1323111320321 is 1230231113231.

It is an interprime number because it is at equal distance from previous prime (1323111320273) and next prime (1323111320369).

It is a cyclic number.

It is not a de Polignac number, because 1323111320321 - 2⁶ = 1323111320257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323111322321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9711371 + ... + 9846671.

It is an arithmetic number, because the mean of its divisors is an integer number (94668644568).

Almost surely, 2^{1323111320321} is an apocalyptic number.

It is an amenable number.

1323111320321 is a deficient number, since it is larger than the sum of its proper divisors (191586992767).

1323111320321 is a wasteful number, since it uses less digits than its factorization.

1323111320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137672.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1323111320321 its reverse (1230231113231), we get a palindrome (2553342433552).

The spelling of 1323111320321 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, three hundred twenty thousand, three hundred twenty-one".