42023113021 has 4 divisors (see below), whose sum is σ = 43378697344. Its totient is φ = 40667528700.

The previous prime is 42023112997. The next prime is 42023113031. The reversal of 42023113021 is 12031132024.

It is a happy number.

42023113021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42023113021 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 42023113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42023113031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677792115 + ... + 677792176.

It is an arithmetic number, because the mean of its divisors is an integer number (10844674336).

Almost surely, 2^42023113021 is an apocalyptic number.

It is an amenable number.

42023113021 is a deficient number, since it is larger than the sum of its proper divisors (1355584323).

42023113021 is a wasteful number, since it uses less digits than its factorization.

42023113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355584322.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 42023113021 its reverse (12031132024), we get a palindrome (54054245045).

The spelling of 42023113021 in words is "forty-two billion, twenty-three million, one hundred thirteen thousand, twenty-one".