42423113221 has 4 divisors (see below), whose sum is σ = 42657495244. Its totient is φ = 42188731200.

The previous prime is 42423113197. The next prime is 42423113237. The reversal of 42423113221 is 12231132424.

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 745890721 + 41677222500 = 27311^2 + 204150^2 .

It is a cyclic number.

It is not a de Polignac number, because 42423113221 - 2¹¹ = 42423111173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42423113281) 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, 117190740 + ... + 117191101.

It is an arithmetic number, because the mean of its divisors is an integer number (10664373811).

Almost surely, 2^42423113221 is an apocalyptic number.

It is an amenable number.

42423113221 is a deficient number, since it is larger than the sum of its proper divisors (234382023).

42423113221 is a wasteful number, since it uses less digits than its factorization.

42423113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234382022.

The product of its digits is 2304, while the sum is 25.

Adding to 42423113221 its reverse (12231132424), we get a palindrome (54654245645).

The spelling of 42423113221 in words is "forty-two billion, four hundred twenty-three million, one hundred thirteen thousand, two hundred twenty-one".