121330220 has 48 divisors (see below), whose sum is σ = 282544416. Its totient is φ = 43392000.

The previous prime is 121330217. The next prime is 121330277. The reversal of 121330220 is 22033121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121330195 and 121330204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8900 + ... + 17940.

It is an arithmetic number, because the mean of its divisors is an integer number (5886342).

Almost surely, 2^121330220 is an apocalyptic number.

121330220 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 121330220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141272208).

121330220 is an abundant number, since it is smaller than the sum of its proper divisors (161214196).

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

121330220 is a wasteful number, since it uses less digits than its factorization.

121330220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9122 (or 9120 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 121330220 is about 11014.9997730368. Note that the first 3 decimals coincide. The cubic root of 121330220 is about 495.0582797075.

Adding to 121330220 its reverse (22033121), we get a palindrome (143363341).

The spelling of 121330220 in words is "one hundred twenty-one million, three hundred thirty thousand, two hundred twenty".