42121013242 has 32 divisors (see below), whose sum is σ = 78949707264. Its totient is φ = 16373713200.

The previous prime is 42121013219. The next prime is 42121013243. The reversal of 42121013242 is 24231012124.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (42121013243) 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 15 ways as a sum of consecutive naturals, for example, 240484 + ... + 376927.

It is an arithmetic number, because the mean of its divisors is an integer number (2467178352).

Almost surely, 2^42121013242 is an apocalyptic number.

42121013242 is a deficient number, since it is larger than the sum of its proper divisors (36828694022).

42121013242 is a wasteful number, since it uses less digits than its factorization.

42121013242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617874.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 42121013242 its reverse (24231012124), we get a palindrome (66352025366).

The spelling of 42121013242 in words is "forty-two billion, one hundred twenty-one million, thirteen thousand, two hundred forty-two".