12120100100 has 36 divisors (see below), whose sum is σ = 26596149300. Its totient is φ = 4793564160.

The previous prime is 12120100087. The next prime is 12120100103. The reversal of 12120100100 is 100102121.

It can be written as a sum of positive squares in 6 ways, for example, as 59228416 + 12060871684 = 7696^2 + 109822^2 .

It is not an unprimeable number, because it can be changed into a prime (12120100103) 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 11 ways as a sum of consecutive naturals, for example, 672005 + ... + 689804.

It is an arithmetic number, because the mean of its divisors is an integer number (738781925).

Almost surely, 2^12120100100 is an apocalyptic number.

12120100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120100100 is an abundant number, since it is smaller than the sum of its proper divisors (14476049200).

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

12120100100 is a wasteful number, since it uses less digits than its factorization.

12120100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361912 (or 1361905 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12120100100 its reverse (100102121), we get a palindrome (12220202221).

The spelling of 12120100100 in words is "twelve billion, one hundred twenty million, one hundred thousand, one hundred".