42401321023 has 2 divisors, whose sum is σ = 42401321024. Its totient is φ = 42401321022.

The previous prime is 42401321021. The next prime is 42401321059. The reversal of 42401321023 is 32012310424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42401321023 - 2¹ = 42401321021 is a prime.

Together with 42401321021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42401320985 and 42401321003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42401321021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200660511 + 21200660512.

It is an arithmetic number, because the mean of its divisors is an integer number (21200660512).

Almost surely, 2^42401321023 is an apocalyptic number.

42401321023 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401321023 is an equidigital number, since it uses as much as digits as its factorization.

42401321023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 42401321023 its reverse (32012310424), we get a palindrome (74413631447).

The spelling of 42401321023 in words is "forty-two billion, four hundred one million, three hundred twenty-one thousand, twenty-three".