1123204121 has 8 divisors (see below), whose sum is σ = 1248624384. Its totient is φ = 1003358160.

The previous prime is 1123204099. The next prime is 1123204123. The reversal of 1123204121 is 1214023211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123204121 - 2¹⁰ = 1123203097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123204121.

It is not an unprimeable number, because it can be changed into a prime (1123204123) 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, 1393151 + ... + 1393956.

It is an arithmetic number, because the mean of its divisors is an integer number (156078048).

Almost surely, 2^1123204121 is an apocalyptic number.

It is an amenable number.

1123204121 is a deficient number, since it is larger than the sum of its proper divisors (125420263).

1123204121 is a wasteful number, since it uses less digits than its factorization.

1123204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787151.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1123204121 is about 33514.2375864348. The cubic root of 1123204121 is about 1039.4881976936.

Adding to 1123204121 its reverse (1214023211), we get a palindrome (2337227332).

The spelling of 1123204121 in words is "one billion, one hundred twenty-three million, two hundred four thousand, one hundred twenty-one".