12011123100 has 36 divisors (see below), whose sum is σ = 34752183704. Its totient is φ = 3202966080.

The previous prime is 12011123093. The next prime is 12011123129. The reversal of 12011123100 is 132111021.

It is a super-2 number, since 2×12011123100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20018239 + ... + 20018838.

Almost surely, 2^12011123100 is an apocalyptic number.

12011123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011123100 is an abundant number, since it is smaller than the sum of its proper divisors (22741060604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011123100 is a wasteful number, since it uses less digits than its factorization.

12011123100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40037094 (or 40037087 counting only the distinct ones).

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

Adding to 12011123100 its reverse (132111021), we get a palindrome (12143234121).

The spelling of 12011123100 in words is "twelve billion, eleven million, one hundred twenty-three thousand, one hundred".