1123243011 has 32 divisors (see below), whose sum is σ = 1859639040. Its totient is φ = 664142400.

The previous prime is 1123243001. The next prime is 1123243013. The reversal of 1123243011 is 1103423211.

1123243011 is a `hidden beast` number, since 1 + 1 + 232 + 430 + 1 + 1 = 666.

It is not a de Polignac number, because 1123243011 - 2¹⁷ = 1123111939 is a prime.

It is a super-2 number, since 2×1123243011² = 2523349723520692242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123243013) 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 31 ways as a sum of consecutive naturals, for example, 33945 + ... + 58298.

It is an arithmetic number, because the mean of its divisors is an integer number (58113720).

Almost surely, 2^1123243011 is an apocalyptic number.

1123243011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123243011 is a deficient number, since it is larger than the sum of its proper divisors (736396029).

1123243011 is a wasteful number, since it uses less digits than its factorization.

1123243011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92304 (or 92298 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1123243011 is about 33514.8177825869. The cubic root of 1123243011 is about 1039.5001946906.

Adding to 1123243011 its reverse (1103423211), we get a palindrome (2226666222).

The spelling of 1123243011 in words is "one billion, one hundred twenty-three million, two hundred forty-three thousand, eleven".