121200100012120 has 16 divisors (see below), whose sum is σ = 272700225027360. Its totient is φ = 48480040004832.

The previous prime is 121200100012091. The next prime is 121200100012157. The reversal of 121200100012120 is 21210001002121.

121200100012120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 121200100012120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515001250112 + ... + 1515001250191.

It is an arithmetic number, because the mean of its divisors is an integer number (17043764064210).

Almost surely, 2^{121200100012120} is an apocalyptic number.

121200100012120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200100012120 is an abundant number, since it is smaller than the sum of its proper divisors (151500125015240).

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

121200100012120 is a wasteful number, since it uses less digits than its factorization.

121200100012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030002500314 (or 3030002500310 counting only the distinct ones).

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

Adding to 121200100012120 its reverse (21210001002121), we get a palindrome (142410101014241).

Subtracting from 121200100012120 its reverse (21210001002121), we obtain a palindrome (99990099009999).

The spelling of 121200100012120 in words is "one hundred twenty-one trillion, two hundred billion, one hundred million, twelve thousand, one hundred twenty".