121101200100120 has 128 divisors (see below), whose sum is σ = 372177399464640. Its totient is φ = 31504925122560.

The previous prime is 121101200100031. The next prime is 121101200100149. The reversal of 121101200100120 is 21001002101121.

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 = 121101200100096 and 121101200100105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148733962 + ... + 149545958.

Almost surely, 2^{121101200100120} is an apocalyptic number.

121101200100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101200100120 is an abundant number, since it is smaller than the sum of its proper divisors (251076199364520).

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

121101200100120 is a wasteful number, since it uses less digits than its factorization.

121101200100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842365 (or 842361 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121101200100120 its reverse (21001002101121), we get a palindrome (142102202201241).

The spelling of 121101200100120 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred million, one hundred thousand, one hundred twenty".