12000012100 has 18 divisors (see below), whose sum is σ = 26040026474. Its totient is φ = 4800004800.

The previous prime is 12000012091. The next prime is 12000012121. The reversal of 12000012100 is 121000021.

It can be written as a sum of positive squares in 3 ways, for example, as 1396367424 + 10603644676 = 37368^2 + 102974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59999961 + ... + 60000160.

Almost surely, 2^12000012100 is an apocalyptic number.

12000012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12000012100 is an abundant number, since it is smaller than the sum of its proper divisors (14040014374).

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

12000012100 is a wasteful number, since it uses less digits than its factorization.

12000012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120000135 (or 120000128 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 12000012100 its reverse (121000021), we get a palindrome (12121012121).

The spelling of 12000012100 in words is "twelve billion, twelve thousand, one hundred".