12021002100120 has 64 divisors (see below), whose sum is σ = 38837083713120. Its totient is φ = 2959015901184.

The previous prime is 12021002100119. The next prime is 12021002100169. The reversal of 12021002100120 is 2100120012021.

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 = 12021002100096 and 12021002100105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3852883729 + ... + 3852886848.

Almost surely, 2^{12021002100120} is an apocalyptic number.

12021002100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021002100120 is an abundant number, since it is smaller than the sum of its proper divisors (26816081613000).

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

12021002100120 is a wasteful number, since it uses less digits than its factorization.

12021002100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7705770604 (or 7705770600 counting only the distinct ones).

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

Adding to 12021002100120 its reverse (2100120012021), we get a palindrome (14121122112141).

The spelling of 12021002100120 in words is "twelve trillion, twenty-one billion, two million, one hundred thousand, one hundred twenty".