121000220 has 48 divisors (see below), whose sum is σ = 293515488. Its totient is φ = 41410560.

The previous prime is 121000213. The next prime is 121000261. The reversal of 121000220 is 22000121.

It is a junction number, because it is equal to n+sod(n) for n = 121000198 and 121000207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12437 + ... + 19916.

It is an arithmetic number, because the mean of its divisors is an integer number (6114906).

Almost surely, 2^121000220 is an apocalyptic number.

121000220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000220 is an abundant number, since it is smaller than the sum of its proper divisors (172515268).

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

121000220 is a wasteful number, since it uses less digits than its factorization.

121000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32390 (or 32388 counting only the distinct ones).

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

The square root of 121000220 is about 11000.0099999955. The cubic root of 121000220 is about 494.6090440876.

Adding to 121000220 its reverse (22000121), we get a palindrome (143000341).

Subtracting from 121000220 its reverse (22000121), we obtain a palindrome (99000099).

The spelling of 121000220 in words is "one hundred twenty-one million, two hundred twenty", and thus it is an aban number.