1123210999 has 4 divisors (see below), whose sum is σ = 1125125064. Its totient is φ = 1121296936.

The previous prime is 1123210969. The next prime is 1123211039. The reversal of 1123210999 is 9990123211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1123210999 - 2²³ = 1114822391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123210969) 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, 956152 + ... + 957325.

It is an arithmetic number, because the mean of its divisors is an integer number (281281266).

Almost surely, 2^1123210999 is an apocalyptic number.

1123210999 is a deficient number, since it is larger than the sum of its proper divisors (1914065).

1123210999 is an equidigital number, since it uses as much as digits as its factorization.

1123210999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914064.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 1123210999 is about 33514.3401993833. The cubic root of 1123210999 is about 1039.4903194763.

The spelling of 1123210999 in words is "one billion, one hundred twenty-three million, two hundred ten thousand, nine hundred ninety-nine".