42121123044242 has 16 divisors (see below), whose sum is σ = 68928282396864. Its totient is φ = 19145184930000.

The previous prime is 42121123044241. The next prime is 42121123044257. The reversal of 42121123044242 is 24244032112124.

42121123044242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42121123044199 and 42121123044208.

It is not an unprimeable number, because it can be changed into a prime (42121123044241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38452109 + ... + 39532352.

It is an arithmetic number, because the mean of its divisors is an integer number (4308017649804).

Almost surely, 2^{42121123044242} is an apocalyptic number.

42121123044242 is a deficient number, since it is larger than the sum of its proper divisors (26807159352622).

42121123044242 is a wasteful number, since it uses less digits than its factorization.

42121123044242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78009025.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 42121123044242 its reverse (24244032112124), we get a palindrome (66365155156366).

The spelling of 42121123044242 in words is "forty-two trillion, one hundred twenty-one billion, one hundred twenty-three million, forty-four thousand, two hundred forty-two".