1121323123 has 2 divisors, whose sum is σ = 1121323124. Its totient is φ = 1121323122.

The previous prime is 1121323097. The next prime is 1121323127. The reversal of 1121323123 is 3213231211.

It is a strong prime.

It is an emirp because it is prime and its reverse (3213231211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121323123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121323123.

It is not a weakly prime, because it can be changed into another prime (1121323127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560661561 + 560661562.

It is an arithmetic number, because the mean of its divisors is an integer number (560661562).

Almost surely, 2^1121323123 is an apocalyptic number.

1121323123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121323123 is an equidigital number, since it uses as much as digits as its factorization.

1121323123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1121323123 is about 33486.1631573401. The cubic root of 1121323123 is about 1038.9076063650.

Adding to 1121323123 its reverse (3213231211), we get a palindrome (4334554334).

The spelling of 1121323123 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-three".