121110200120 has 192 divisors, whose sum is σ = 343779024960. Its totient is φ = 37392629760.

The previous prime is 121110200069. The next prime is 121110200129. The reversal of 121110200120 is 21002011121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110200129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6108944 + ... + 6128736.

It is an arithmetic number, because the mean of its divisors is an integer number (1790515755).

Almost surely, 2^121110200120 is an apocalyptic number.

121110200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121110200120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171889512480).

121110200120 is an abundant number, since it is smaller than the sum of its proper divisors (222668824840).

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

121110200120 is a wasteful number, since it uses less digits than its factorization.

121110200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19906 (or 19861 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121110200120 its reverse (21002011121), we get a palindrome (142112211241).

The spelling of 121110200120 in words is "one hundred twenty-one billion, one hundred ten million, two hundred thousand, one hundred twenty".