121100144 has 40 divisors (see below), whose sum is σ = 257007360. Its totient is φ = 54820800.

The previous prime is 121100131. The next prime is 121100159. The reversal of 121100144 is 441001121.

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 7 ways as a sum of consecutive naturals, for example, 46427 + ... + 48965.

It is an arithmetic number, because the mean of its divisors is an integer number (6425184).

Almost surely, 2^121100144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121100144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128503680).

121100144 is an abundant number, since it is smaller than the sum of its proper divisors (135907216).

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

121100144 is a wasteful number, since it uses less digits than its factorization.

121100144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 121100144 is about 11004.5510585394. The cubic root of 121100144 is about 494.7451587588.

Adding to 121100144 its reverse (441001121), we get a palindrome (562101265).

The spelling of 121100144 in words is "one hundred twenty-one million, one hundred thousand, one hundred forty-four".