203123161118203 has 2 divisors, whose sum is σ = 203123161118204. Its totient is φ = 203123161118202.

The previous prime is 203123161118173. The next prime is 203123161118221. The reversal of 203123161118203 is 302811161321302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203123161118203 is a prime.

It is not a weakly prime, because it can be changed into another prime (203123161118803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561580559101 + 101561580559102.

It is an arithmetic number, because the mean of its divisors is an integer number (101561580559102).

Almost surely, 2^{203123161118203} is an apocalyptic number.

203123161118203 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123161118203 is an equidigital number, since it uses as much as digits as its factorization.

203123161118203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 203123161118203 in words is "two hundred three trillion, one hundred twenty-three billion, one hundred sixty-one million, one hundred eighteen thousand, two hundred three".