1123021144 has 32 divisors (see below), whose sum is σ = 2533132800. Its totient is φ = 455963040.

The previous prime is 1123021127. The next prime is 1123021147. The reversal of 1123021144 is 4411203211.

It is a super-2 number, since 2×1123021144² = 2522352979742137472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123021147) 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, 526672 + ... + 528799.

It is an arithmetic number, because the mean of its divisors is an integer number (79160400).

Almost surely, 2^1123021144 is an apocalyptic number.

1123021144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1123021144 is an abundant number, since it is smaller than the sum of its proper divisors (1410111656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123021144 is a wasteful number, since it uses less digits than its factorization.

1123021144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055503 (or 1055499 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1123021144 is about 33511.5076354377. The cubic root of 1123021144 is about 1039.4317482446.

Adding to 1123021144 its reverse (4411203211), we get a palindrome (5534224355).

The spelling of 1123021144 in words is "one billion, one hundred twenty-three million, twenty-one thousand, one hundred forty-four".