1323123101 has 2 divisors, whose sum is σ = 1323123102. Its totient is φ = 1323123100.

The previous prime is 1323123091. The next prime is 1323123103. The reversal of 1323123101 is 1013213231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1323067876 + 55225 = 36374^2 + 235^2 .

It is an emirp because it is prime and its reverse (1013213231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323123101 is a prime.

It is a Sophie Germain prime.

Together with 1323123103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323123101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323123103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661561550 + 661561551.

It is an arithmetic number, because the mean of its divisors is an integer number (661561551).

Almost surely, 2^1323123101 is an apocalyptic number.

It is an amenable number.

1323123101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323123101 is an equidigital number, since it uses as much as digits as its factorization.

1323123101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1323123101 is about 36374.7591194773. The cubic root of 1323123101 is about 1097.8257606427.

Adding to 1323123101 its reverse (1013213231), we get a palindrome (2336336332).

The spelling of 1323123101 in words is "one billion, three hundred twenty-three million, one hundred twenty-three thousand, one hundred one".