1123021123 has 8 divisors (see below), whose sum is σ = 1301034848. Its totient is φ = 949402944.

The previous prime is 1123021111. The next prime is 1123021127. The reversal of 1123021123 is 3211203211.

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

It is a de Polignac number, because none of the positive numbers 2^k-1123021123 is a prime.

It is a super-2 number, since 2×1123021123² = 2522352885408362258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123021097 and 1123021106.

It is not an unprimeable number, because it can be changed into a prime (1123021127) 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 in 7 ways as a sum of consecutive naturals, for example, 1098336 + ... + 1099357.

It is an arithmetic number, because the mean of its divisors is an integer number (162629356).

Almost surely, 2^1123021123 is an apocalyptic number.

1123021123 is a deficient number, since it is larger than the sum of its proper divisors (178013725).

1123021123 is an equidigital number, since it uses as much as digits as its factorization.

1123021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197773.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1123021123 is about 33511.5073221125. The cubic root of 1123021123 is about 1039.4317417656.

Adding to 1123021123 its reverse (3211203211), we get a palindrome (4334224334).

The spelling of 1123021123 in words is "one billion, one hundred twenty-three million, twenty-one thousand, one hundred twenty-three".