42320420123 has 4 divisors (see below), whose sum is σ = 42496023768. Its totient is φ = 42144816480.

The previous prime is 42320420111. The next prime is 42320420147. The reversal of 42320420123 is 32102402324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42320420123 - 2⁶ = 42320420059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42320420173) 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, 87801461 + ... + 87801942.

It is an arithmetic number, because the mean of its divisors is an integer number (10624005942).

Almost surely, 2^42320420123 is an apocalyptic number.

42320420123 is a deficient number, since it is larger than the sum of its proper divisors (175603645).

42320420123 is a wasteful number, since it uses less digits than its factorization.

42320420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175603644.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 42320420123 its reverse (32102402324), we get a palindrome (74422822447).

The spelling of 42320420123 in words is "forty-two billion, three hundred twenty million, four hundred twenty thousand, one hundred twenty-three".