121103042424 has 128 divisors (see below), whose sum is σ = 376314785280. Its totient is φ = 31622976000.

The previous prime is 121103042393. The next prime is 121103042429. The reversal of 121103042424 is 424240301121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 121103042394 and 121103042403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103042429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53922 + ... + 495089.

It is an arithmetic number, because the mean of its divisors is an integer number (2939959260).

Almost surely, 2^121103042424 is an apocalyptic number.

121103042424 is a gapful number since it is divisible by the number (14) 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 121103042424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188157392640).

121103042424 is an abundant number, since it is smaller than the sum of its proper divisors (255211742856).

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

121103042424 is a wasteful number, since it uses less digits than its factorization.

121103042424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549141 (or 549137 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121103042424 its reverse (424240301121), we get a palindrome (545343343545).

The spelling of 121103042424 in words is "one hundred twenty-one billion, one hundred three million, forty-two thousand, four hundred twenty-four".