12021100200120 has 128 divisors (see below), whose sum is σ = 41052294858240. Its totient is φ = 2787501488640.

The previous prime is 12021100200101. The next prime is 12021100200127. The reversal of 12021100200120 is 2100200112021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12021100200096 and 12021100200105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021100200127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197945599 + ... + 198006318.

It is an arithmetic number, because the mean of its divisors is an integer number (320721053580).

Almost surely, 2^{12021100200120} is an apocalyptic number.

12021100200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021100200120 is an abundant number, since it is smaller than the sum of its proper divisors (29031194658120).

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

12021100200120 is a wasteful number, since it uses less digits than its factorization.

12021100200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395951965 (or 395951961 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12021100200120 its reverse (2100200112021), we get a palindrome (14121300312141).

The spelling of 12021100200120 in words is "twelve trillion, twenty-one billion, one hundred million, two hundred thousand, one hundred twenty".