121550200120 has 64 divisors (see below), whose sum is σ = 280889532000. Its totient is φ = 47312659968.

The previous prime is 121550200099. The next prime is 121550200129. The reversal of 121550200120 is 21002055121.

121550200120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121550200120² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121550200129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331326 + ... + 594034.

Almost surely, 2^121550200120 is an apocalyptic number.

121550200120 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 121550200120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140444766000).

121550200120 is an abundant number, since it is smaller than the sum of its proper divisors (159339331880).

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

121550200120 is a wasteful number, since it uses less digits than its factorization.

121550200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263032 (or 263028 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 121550200120 its reverse (21002055121), we get a palindrome (142552255241).

The spelling of 121550200120 in words is "one hundred twenty-one billion, five hundred fifty million, two hundred thousand, one hundred twenty".