1321030123 has 4 divisors (see below), whose sum is σ = 1509748720. Its totient is φ = 1132311528.

The previous prime is 1321030037. The next prime is 1321030153. The reversal of 1321030123 is 3210301231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3210301231 = 5807 ⋅552833.

It is a cyclic number.

It is not a de Polignac number, because 1321030123 - 2¹⁷ = 1320899051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321030097 and 1321030106.

It is not an unprimeable number, because it can be changed into a prime (1321030153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94359288 + ... + 94359301.

It is an arithmetic number, because the mean of its divisors is an integer number (377437180).

Almost surely, 2^1321030123 is an apocalyptic number.

1321030123 is a deficient number, since it is larger than the sum of its proper divisors (188718597).

1321030123 is an equidigital number, since it uses as much as digits as its factorization.

1321030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188718596.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1321030123 is about 36345.9780856149. The cubic root of 1321030123 is about 1097.2465911059.

Adding to 1321030123 its reverse (3210301231), we get a palindrome (4531331354).

The spelling of 1321030123 in words is "one billion, three hundred twenty-one million, thirty thousand, one hundred twenty-three".