12011100100 has 54 divisors (see below), whose sum is σ = 27687522590. Its totient is φ = 4521815040.

The previous prime is 12011100077. The next prime is 12011100107. The reversal of 12011100100 is 100111021.

It can be written as a sum of positive squares in 9 ways, for example, as 1654374276 + 10356725824 = 40674^2 + 101768^2 .

It is a super-2 number, since 2×12011100100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12011100107) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 178905 + ... + 236704.

Almost surely, 2^12011100100 is an apocalyptic number.

12011100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011100100 is an abundant number, since it is smaller than the sum of its proper divisors (15676422490).

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

12011100100 is a wasteful number, since it uses less digits than its factorization.

12011100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415657 (or 415633 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 12011100100 its reverse (100111021), we get a palindrome (12111211121).

The spelling of 12011100100 in words is "twelve billion, eleven million, one hundred thousand, one hundred".