42121534512 has 40 divisors (see below), whose sum is σ = 109366343856. Its totient is φ = 13969236736.

The previous prime is 42121534501. The next prime is 42121534517. The reversal of 42121534512 is 21543512124.

It is a self number, because there is not a number n which added to its sum of digits gives 42121534512.

It is not an unprimeable number, because it can be changed into a prime (42121534517) 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 7 ways as a sum of consecutive naturals, for example, 2217783 + ... + 2236694.

Almost surely, 2^42121534512 is an apocalyptic number.

It is an amenable number.

42121534512 is an abundant number, since it is smaller than the sum of its proper divisors (67244809344).

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

42121534512 is a wasteful number, since it uses less digits than its factorization.

42121534512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454685 (or 4454679 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The spelling of 42121534512 in words is "forty-two billion, one hundred twenty-one million, five hundred thirty-four thousand, five hundred twelve".