1121323999 has 2 divisors, whose sum is σ = 1121324000. Its totient is φ = 1121323998.

The previous prime is 1121323967. The next prime is 1121324011. The reversal of 1121323999 is 9993231211.

It is a strong prime.

It is an emirp because it is prime and its reverse (9993231211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121323999 - 2⁵ = 1121323967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121323939) 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, 560661999 + 560662000.

It is an arithmetic number, because the mean of its divisors is an integer number (560662000).

Almost surely, 2^1121323999 is an apocalyptic number.

1121323999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121323999 is an equidigital number, since it uses as much as digits as its factorization.

1121323999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 1121323999 is about 33486.1762373670. The cubic root of 1121323999 is about 1038.9078769034.

The spelling of 1121323999 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, nine hundred ninety-nine".