1123053021 has 6 divisors (see below), whose sum is σ = 1622187710. Its totient is φ = 748702008.

The previous prime is 1123052989. The next prime is 1123053047. The reversal of 1123053021 is 1203503211.

1123053021 is a `hidden beast` number, since 112 + 3 + 0 + 530 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 751527396 + 371525625 = 27414^2 + 19275^2 .

It is not a de Polignac number, because 1123053021 - 2⁵ = 1123052989 is a prime.

It is a super-2 number, since 2×1123053021² = 2522496175954452882, 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 = 1123052985 and 1123053003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123053721) 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 5 ways as a sum of consecutive naturals, for example, 62391826 + ... + 62391843.

Almost surely, 2^1123053021 is an apocalyptic number.

It is an amenable number.

1123053021 is a deficient number, since it is larger than the sum of its proper divisors (499134689).

1123053021 is a wasteful number, since it uses less digits than its factorization.

1123053021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124783675 (or 124783672 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1123053021 is about 33511.9832448036. The cubic root of 1123053021 is about 1039.4415829221.

Adding to 1123053021 its reverse (1203503211), we get a palindrome (2326556232).

The spelling of 1123053021 in words is "one billion, one hundred twenty-three million, fifty-three thousand, twenty-one".