121101200220 has 384 divisors, whose sum is σ = 479239004160. Its totient is φ = 22005457920.

The previous prime is 121101200219. The next prime is 121101200237. The reversal of 121101200220 is 22002101121.

121101200220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 121101200196 and 121101200205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1088079 + ... + 1194201.

It is an arithmetic number, because the mean of its divisors is an integer number (1248018240).

Almost surely, 2^121101200220 is an apocalyptic number.

121101200220 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 121101200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239619502080).

121101200220 is an abundant number, since it is smaller than the sum of its proper divisors (358137803940).

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

121101200220 is a wasteful number, since it uses less digits than its factorization.

121101200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106185 (or 106183 counting only the distinct ones).

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

Adding to 121101200220 its reverse (22002101121), we get a palindrome (143103301341).

Subtracting from 121101200220 its reverse (22002101121), we obtain a palindrome (99099099099).

The spelling of 121101200220 in words is "one hundred twenty-one billion, one hundred one million, two hundred thousand, two hundred twenty".