42123433321897 has 2 divisors, whose sum is σ = 42123433321898. Its totient is φ = 42123433321896.

The previous prime is 42123433321891. The next prime is 42123433322011. The reversal of 42123433321897 is 79812333432124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41143642177561 + 979791144336 = 6414331^2 + 989844^2 .

It is a cyclic number.

It is not a de Polignac number, because 42123433321897 - 2²⁷ = 42123299104169 is a prime.

It is not a weakly prime, because it can be changed into another prime (42123433321891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21061716660948 + 21061716660949.

It is an arithmetic number, because the mean of its divisors is an integer number (21061716660949).

Almost surely, 2^{42123433321897} is an apocalyptic number.

It is an amenable number.

42123433321897 is a deficient number, since it is larger than the sum of its proper divisors (1).

42123433321897 is an equidigital number, since it uses as much as digits as its factorization.

42123433321897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 52.

The spelling of 42123433321897 in words is "forty-two trillion, one hundred twenty-three billion, four hundred thirty-three million, three hundred twenty-one thousand, eight hundred ninety-seven".