42202123 has 2 divisors, whose sum is σ = 42202124. Its totient is φ = 42202122.

The previous prime is 42202001. The next prime is 42202157. The reversal of 42202123 is 32120224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42202123 - 2⁹ = 42201611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42202097 and 42202106.

It is not a weakly prime, because it can be changed into another prime (42208123) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101061 + 21101062.

It is an arithmetic number, because the mean of its divisors is an integer number (21101062).

Almost surely, 2^42202123 is an apocalyptic number.

42202123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42202123 is an equidigital number, since it uses as much as digits as its factorization.

42202123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42202123 is about 6496.3161099195. The cubic root of 42202123 is about 348.1593794767.

Adding to 42202123 its reverse (32120224), we get a palindrome (74322347).

The spelling of 42202123 in words is "forty-two million, two hundred two thousand, one hundred twenty-three".