502042123322161 has 2 divisors, whose sum is σ = 502042123322162. Its totient is φ = 502042123322160.

The previous prime is 502042123322071. The next prime is 502042123322183. The reversal of 502042123322161 is 161223321240205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435594258101025 + 66447865221136 = 20870895^2 + 8151556^2 .

It is a cyclic number.

It is not a de Polignac number, because 502042123322161 - 2⁴⁵ = 466857751233329 is a prime.

It is not a weakly prime, because it can be changed into another prime (502042123323161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251021061661080 + 251021061661081.

It is an arithmetic number, because the mean of its divisors is an integer number (251021061661081).

Almost surely, 2^{502042123322161} is an apocalyptic number.

It is an amenable number.

502042123322161 is a deficient number, since it is larger than the sum of its proper divisors (1).

502042123322161 is an equidigital number, since it uses as much as digits as its factorization.

502042123322161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 502042123322161 its reverse (161223321240205), we get a palindrome (663265444562366).

The spelling of 502042123322161 in words is "five hundred two trillion, forty-two billion, one hundred twenty-three million, three hundred twenty-two thousand, one hundred sixty-one".