42023145535221 has 16 divisors (see below), whose sum is σ = 56113241269248. Its totient is φ = 27974241951600.

The previous prime is 42023145535219. The next prime is 42023145535229. The reversal of 42023145535221 is 12253554132024.

It is not a de Polignac number, because 42023145535221 - 2¹ = 42023145535219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42023145535221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42023145535229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100063540 + ... + 100482626.

It is an arithmetic number, because the mean of its divisors is an integer number (3507077579328).

Almost surely, 2^{42023145535221} is an apocalyptic number.

It is an amenable number.

42023145535221 is a deficient number, since it is larger than the sum of its proper divisors (14090095734027).

42023145535221 is a wasteful number, since it uses less digits than its factorization.

42023145535221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468152.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 42023145535221 its reverse (12253554132024), we get a palindrome (54276699667245).

The spelling of 42023145535221 in words is "forty-two trillion, twenty-three billion, one hundred forty-five million, five hundred thirty-five thousand, two hundred twenty-one".