1123430011 has 16 divisors (see below), whose sum is σ = 1235824128. Its totient is φ = 1012787200.

The previous prime is 1123429999. The next prime is 1123430027. The reversal of 1123430011 is 1100343211.

It is a cyclic number.

It is not a de Polignac number, because 1123430011 - 2²¹ = 1121332859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123430911) 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, 742746 + ... + 744256.

It is an arithmetic number, because the mean of its divisors is an integer number (77239008).

Almost surely, 2^1123430011 is an apocalyptic number.

1123430011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123430011 is a deficient number, since it is larger than the sum of its proper divisors (112394117).

1123430011 is a wasteful number, since it uses less digits than its factorization.

1123430011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042.

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

The square root of 1123430011 is about 33517.6074772648. The cubic root of 1123430011 is about 1039.5578775928.

Adding to 1123430011 its reverse (1100343211), we get a palindrome (2223773222).

It can be divided in two parts, 1123 and 430011, that added together give a palindrome (431134).

The spelling of 1123430011 in words is "one billion, one hundred twenty-three million, four hundred thirty thousand, eleven".