1123013221 has 24 divisors (see below), whose sum is σ = 1303080800. Its totient is φ = 964418400.

The previous prime is 1123013219. The next prime is 1123013231. The reversal of 1123013221 is 1223103211.

It is not a de Polignac number, because 1123013221 - 2¹ = 1123013219 is a prime.

It is a super-2 number, since 2×1123013221² = 2522317389081589682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123013195 and 1123013204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123013201) 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 23 ways as a sum of consecutive naturals, for example, 1519270 + ... + 1520008.

Almost surely, 2^1123013221 is an apocalyptic number.

1123013221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123013221 is a deficient number, since it is larger than the sum of its proper divisors (180067579).

1123013221 is a wasteful number, since it uses less digits than its factorization.

1123013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1430 counting only the distinct ones).

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

The square root of 1123013221 is about 33511.3894221054. The cubic root of 1123013221 is about 1039.4293038154.

Adding to 1123013221 its reverse (1223103211), we get a palindrome (2346116432).

The spelling of 1123013221 in words is "one billion, one hundred twenty-three million, thirteen thousand, two hundred twenty-one".