121043424 has 96 divisors (see below), whose sum is σ = 328527360. Its totient is φ = 39002112.

The previous prime is 121043423. The next prime is 121043431. The reversal of 121043424 is 424340121.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 121043424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121043423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627072 + ... + 627264.

It is an arithmetic number, because the mean of its divisors is an integer number (3422160).

Almost surely, 2^121043424 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 121043424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164263680).

121043424 is an abundant number, since it is smaller than the sum of its proper divisors (207483936).

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

121043424 is a wasteful number, since it uses less digits than its factorization.

121043424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 121043424 is about 11001.9736411246. The cubic root of 121043424 is about 494.6679049897.

Adding to 121043424 its reverse (424340121), we get a palindrome (545383545).

The spelling of 121043424 in words is "one hundred twenty-one million, forty-three thousand, four hundred twenty-four".