1123100181 has 16 divisors (see below), whose sum is σ = 1901545600. Its totient is φ = 641771424.

The previous prime is 1123100171. The next prime is 1123100201. The reversal of 1123100181 is 1810013211.

It is a happy number.

It is not a de Polignac number, because 1123100181 - 2⁵ = 1123100149 is a prime.

It is a super-2 number, since 2×1123100181² = 2522708033124465522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123100171) 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 15 ways as a sum of consecutive naturals, for example, 2970976 + ... + 2971353.

It is an arithmetic number, because the mean of its divisors is an integer number (118846600).

Almost surely, 2^1123100181 is an apocalyptic number.

It is an amenable number.

1123100181 is a deficient number, since it is larger than the sum of its proper divisors (778445419).

1123100181 is an equidigital number, since it uses as much as digits as its factorization.

1123100181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942345 (or 5942339 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

The square root of 1123100181 is about 33512.6868663197. The cubic root of 1123100181 is about 1039.4561323625.

Adding to 1123100181 its reverse (1810013211), we get a palindrome (2933113392).

The spelling of 1123100181 in words is "one billion, one hundred twenty-three million, one hundred thousand, one hundred eighty-one".