121440222 has 48 divisors (see below), whose sum is σ = 276407040. Its totient is φ = 39955032.

The previous prime is 121440199. The next prime is 121440239. The reversal of 121440222 is 222044121.

121440222 is a `hidden beast` number, since 1 + 2 + 1 + 440 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121440195 and 121440204.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 36813 + ... + 39975.

It is an arithmetic number, because the mean of its divisors is an integer number (5758480).

Almost surely, 2^121440222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121440222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138203520).

121440222 is an abundant number, since it is smaller than the sum of its proper divisors (154966818).

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

121440222 is an equidigital number, since it uses as much as digits as its factorization.

121440222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259 (or 3247 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121440222 is about 11019.9919237720. The cubic root of 121440222 is about 495.2078465989.

Adding to 121440222 its reverse (222044121), we get a palindrome (343484343).

The spelling of 121440222 in words is "one hundred twenty-one million, four hundred forty thousand, two hundred twenty-two".