12021212100100 has 36 divisors (see below), whose sum is σ = 29812606009984. Its totient is φ = 4121558434080.

The previous prime is 12021212100077. The next prime is 12021212100103. The reversal of 12021212100100 is 100121212021.

It is not an unprimeable number, because it can be changed into a prime (12021212100103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8586579372 + ... + 8586580771.

Almost surely, 2^{12021212100100} is an apocalyptic number.

12021212100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021212100100 is an abundant number, since it is smaller than the sum of its proper divisors (17791393909884).

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

12021212100100 is a wasteful number, since it uses less digits than its factorization.

12021212100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17173160164 (or 17173160157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021212100100 its reverse (100121212021), we get a palindrome (12121333312121).

The spelling of 12021212100100 in words is "twelve trillion, twenty-one billion, two hundred twelve million, one hundred thousand, one hundred".