42002120523 has 48 divisors (see below), whose sum is σ = 62131045760. Its totient is φ = 25219434240.

The previous prime is 42002120491. The next prime is 42002120527. The reversal of 42002120523 is 32502120024.

It is not a de Polignac number, because 42002120523 - 2⁵ = 42002120491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42002120523.

It is not an unprimeable number, because it can be changed into a prime (42002120527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22424115 + ... + 22425987.

Almost surely, 2^42002120523 is an apocalyptic number.

42002120523 is a deficient number, since it is larger than the sum of its proper divisors (20128925237).

42002120523 is a wasteful number, since it uses less digits than its factorization.

42002120523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440 (or 2429 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 42002120523 its reverse (32502120024), we get a palindrome (74504240547).

The spelling of 42002120523 in words is "forty-two billion, two million, one hundred twenty thousand, five hundred twenty-three".