121103220 has 96 divisors (see below), whose sum is σ = 398055168. Its totient is φ = 26929152.

The previous prime is 121103219. The next prime is 121103221. The reversal of 121103220 is 22301121.

It is an interprime number because it is at equal distance from previous prime (121103219) and next prime (121103221).

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 = 121103196 and 121103205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11644 + ... + 19436.

It is an arithmetic number, because the mean of its divisors is an integer number (4146408).

Almost surely, 2^121103220 is an apocalyptic number.

121103220 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 121103220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199027584).

121103220 is an abundant number, since it is smaller than the sum of its proper divisors (276951948).

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

121103220 is a wasteful number, since it uses less digits than its factorization.

121103220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849 (or 7847 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121103220 is about 11004.6908180103. The cubic root of 121103220 is about 494.7493476424.

Adding to 121103220 its reverse (22301121), we get a palindrome (143404341).

The spelling of 121103220 in words is "one hundred twenty-one million, one hundred three thousand, two hundred twenty".