121332220 has 12 divisors (see below), whose sum is σ = 254797704. Its totient is φ = 48532880.

The previous prime is 121332217. The next prime is 121332223. The reversal of 121332220 is 22233121.

It is an interprime number because it is at equal distance from previous prime (121332217) and next prime (121332223).

It is a super-2 number, since 2×121332220² = 29443015220256800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121332194 and 121332203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121332223) 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 3 ways as a sum of consecutive naturals, for example, 3033286 + ... + 3033325.

It is an arithmetic number, because the mean of its divisors is an integer number (21233142).

Almost surely, 2^121332220 is an apocalyptic number.

121332220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121332220 is an abundant number, since it is smaller than the sum of its proper divisors (133465484).

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

121332220 is a wasteful number, since it uses less digits than its factorization.

121332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066620 (or 6066618 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 121332220 is about 11015.0905579573. The cubic root of 121332220 is about 495.0609998628.

Adding to 121332220 its reverse (22233121), we get a palindrome (143565341).

Subtracting from 121332220 its reverse (22233121), we obtain a palindrome (99099099).

It can be divided in two parts, 1213 and 32220, that added together give a palindrome (33433).

The spelling of 121332220 in words is "one hundred twenty-one million, three hundred thirty-two thousand, two hundred twenty".