1121323399 has 18 divisors (see below), whose sum is σ = 1376684064. Its totient is φ = 910533960.

The previous prime is 1121323387. The next prime is 1121323403. The reversal of 1121323399 is 9933231211.

It is not a de Polignac number, because 1121323399 - 2¹¹ = 1121321351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121323319) 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 in 17 ways as a sum of consecutive naturals, for example, 14007 + ... + 49384.

It is an arithmetic number, because the mean of its divisors is an integer number (76482448).

Almost surely, 2^1121323399 is an apocalyptic number.

1121323399 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1121323399 is a deficient number, since it is larger than the sum of its proper divisors (255360665).

1121323399 is an equidigital number, since it uses as much as digits as its factorization.

1121323399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63443 (or 63417 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 1121323399 is about 33486.1672784450. The cubic root of 1121323399 is about 1038.9076916031.

The spelling of 1121323399 in words is "one billion, one hundred twenty-one million, three hundred twenty-three thousand, three hundred ninety-nine".