12011212100 has 18 divisors (see below), whose sum is σ = 26064330474. Its totient is φ = 4804484800.

The previous prime is 12011212091. The next prime is 12011212139. The reversal of 12011212100 is 121211021.

12011212100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 47665216 + 11963546884 = 6904^2 + 109378^2 .

It is a super-2 number, since 2×12011212100² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60055961 + ... + 60056160.

Almost surely, 2^12011212100 is an apocalyptic number.

12011212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011212100 is an abundant number, since it is smaller than the sum of its proper divisors (14053118374).

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

12011212100 is a wasteful number, since it uses less digits than its factorization.

12011212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120112135 (or 120112128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12011212100 its reverse (121211021), we get a palindrome (12132423121).

The spelling of 12011212100 in words is "twelve billion, eleven million, two hundred twelve thousand, one hundred".