42123223423 has 2 divisors, whose sum is σ = 42123223424. Its totient is φ = 42123223422.

The previous prime is 42123223379. The next prime is 42123223433. The reversal of 42123223423 is 32432232124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42123223423 - 2²⁵ = 42089668991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42123223391 and 42123223400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42123223433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061611711 + 21061611712.

It is an arithmetic number, because the mean of its divisors is an integer number (21061611712).

Almost surely, 2^42123223423 is an apocalyptic number.

42123223423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42123223423 is an equidigital number, since it uses as much as digits as its factorization.

42123223423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 28.

Adding to 42123223423 its reverse (32432232124), we get a palindrome (74555455547).

The spelling of 42123223423 in words is "forty-two billion, one hundred twenty-three million, two hundred twenty-three thousand, four hundred twenty-three".