121040442 has 48 divisors (see below), whose sum is σ = 284169600. Its totient is φ = 37086336.

The previous prime is 121040419. The next prime is 121040443. The reversal of 121040442 is 244040121.

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

It is not an unprimeable number, because it can be changed into a prime (121040443) 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 23 ways as a sum of consecutive naturals, for example, 8559 + ... + 17757.

It is an arithmetic number, because the mean of its divisors is an integer number (5920200).

Almost surely, 2^121040442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121040442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142084800).

121040442 is an abundant number, since it is smaller than the sum of its proper divisors (163129158).

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

121040442 is a wasteful number, since it uses less digits than its factorization.

121040442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9267 (or 9264 counting only the distinct ones).

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

The square root of 121040442 is about 11001.8381191508. The cubic root of 121040442 is about 494.6638427786.

Adding to 121040442 its reverse (244040121), we get a palindrome (365080563).

The spelling of 121040442 in words is "one hundred twenty-one million, forty thousand, four hundred forty-two".