42022000421 has 4 divisors (see below), whose sum is σ = 42043087212. Its totient is φ = 42000913632.

The previous prime is 42022000381. The next prime is 42022000439. The reversal of 42022000421 is 12400022024.

It is a happy number.

42022000421 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.

It can be written as a sum of positive squares in 2 ways, for example, as 17969402500 + 24052597921 = 134050^2 + 155089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42022000421 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 42022000421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42022000451) 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, 10540406 + ... + 10544391.

It is an arithmetic number, because the mean of its divisors is an integer number (10510771803).

Almost surely, 2^42022000421 is an apocalyptic number.

It is an amenable number.

42022000421 is a deficient number, since it is larger than the sum of its proper divisors (21086791).

42022000421 is a wasteful number, since it uses less digits than its factorization.

42022000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21086790.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 42022000421 its reverse (12400022024), we get a palindrome (54422022445).

The spelling of 42022000421 in words is "forty-two billion, twenty-two million, four hundred twenty-one", and thus it is an aban number.