1123111011 has 32 divisors (see below), whose sum is σ = 1658647296. Its totient is φ = 670320000.

The previous prime is 1123111009. The next prime is 1123111051. The reversal of 1123111011 is 1101113211.

It is not a de Polignac number, because 1123111011 - 2¹ = 1123111009 is a prime.

It is a super-2 number, since 2×1123111011² = 2522756686058884242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123111051) 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, 702465 + ... + 704061.

It is an arithmetic number, because the mean of its divisors is an integer number (51832728).

Almost surely, 2^1123111011 is an apocalyptic number.

1123111011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123111011 is a deficient number, since it is larger than the sum of its proper divisors (535536285).

1123111011 is a wasteful number, since it uses less digits than its factorization.

1123111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 1123111011 is about 33512.8484465287. The cubic root of 1123111011 is about 1039.4594734933.

Adding to 1123111011 its reverse (1101113211), we get a palindrome (2224224222).

The spelling of 1123111011 in words is "one billion, one hundred twenty-three million, one hundred eleven thousand, eleven".