1123142223 has 16 divisors (see below), whose sum is σ = 1711982336. Its totient is φ = 641597760.

The previous prime is 1123142219. The next prime is 1123142227. The reversal of 1123142223 is 3222413211.

It is an interprime number because it is at equal distance from previous prime (1123142219) and next prime (1123142227).

It is not a de Polignac number, because 1123142223 - 2² = 1123142219 is a prime.

It is a super-2 number, since 2×1123142223² = 2522896906170763458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1123142223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123142227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87240 + ... + 99282.

It is an arithmetic number, because the mean of its divisors is an integer number (106998896).

Almost surely, 2^1123142223 is an apocalyptic number.

1123142223 is a deficient number, since it is larger than the sum of its proper divisors (588840113).

1123142223 is a wasteful number, since it uses less digits than its factorization.

1123142223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16494.

The product of its digits is 576, while the sum is 21.

The square root of 1123142223 is about 33513.3141154378. The cubic root of 1123142223 is about 1039.4691024935.

Adding to 1123142223 its reverse (3222413211), we get a palindrome (4345555434).

The spelling of 1123142223 in words is "one billion, one hundred twenty-three million, one hundred forty-two thousand, two hundred twenty-three".