1123042021 has 8 divisors (see below), whose sum is σ = 1135663200. Its totient is φ = 1110486000.

The previous prime is 1123041977. The next prime is 1123042043. The reversal of 1123042021 is 1202403211.

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 1123042021 - 2⁷ = 1123041893 is a prime.

It is a super-2 number, since 2×1123042021² = 2522446761863528882, 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 = 1123041986 and 1123042004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123042061) 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 7 ways as a sum of consecutive naturals, for example, 18795 + ... + 50983.

It is an arithmetic number, because the mean of its divisors is an integer number (141957900).

Almost surely, 2^1123042021 is an apocalyptic number.

It is an amenable number.

1123042021 is a deficient number, since it is larger than the sum of its proper divisors (12621179).

1123042021 is a wasteful number, since it uses less digits than its factorization.

1123042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32579.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1123042021 is about 33511.8191240046. The cubic root of 1123042021 is about 1039.4381892282.

Adding to 1123042021 its reverse (1202403211), we get a palindrome (2325445232).

The spelling of 1123042021 in words is "one billion, one hundred twenty-three million, forty-two thousand, twenty-one".