42042310021 has 8 divisors (see below), whose sum is σ = 44314006400. Its totient is φ = 39776508000.

The previous prime is 42042309989. The next prime is 42042310039. The reversal of 42042310021 is 12001324024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42042310021 - 2⁵ = 42042309989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042310061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458936 + ... + 1487473.

It is an arithmetic number, because the mean of its divisors is an integer number (5539250800).

Almost surely, 2^42042310021 is an apocalyptic number.

It is an amenable number.

42042310021 is a deficient number, since it is larger than the sum of its proper divisors (2271696379).

42042310021 is a wasteful number, since it uses less digits than its factorization.

42042310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947179.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 42042310021 its reverse (12001324024), we get a palindrome (54043634045).

The spelling of 42042310021 in words is "forty-two billion, forty-two million, three hundred ten thousand, twenty-one".