1321303123 has 8 divisors (see below), whose sum is σ = 1523915360. Its totient is φ = 1122154560.

The previous prime is 1321303099. The next prime is 1321303129. The reversal of 1321303123 is 3213031231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321303123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321303123.

It is not an unprimeable number, because it can be changed into a prime (1321303129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865098 + ... + 866623.

It is an arithmetic number, because the mean of its divisors is an integer number (190489420).

Almost surely, 2^1321303123 is an apocalyptic number.

1321303123 is a deficient number, since it is larger than the sum of its proper divisors (202612237).

1321303123 is a wasteful number, since it uses less digits than its factorization.

1321303123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731837.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1321303123 is about 36349.7334653227. The cubic root of 1321303123 is about 1097.3221704290.

Adding to 1321303123 its reverse (3213031231), we get a palindrome (4534334354).

The spelling of 1321303123 in words is "one billion, three hundred twenty-one million, three hundred three thousand, one hundred twenty-three".