203030311123 has 2 divisors, whose sum is σ = 203030311124. Its totient is φ = 203030311122.

The previous prime is 203030311097. The next prime is 203030311151. The reversal of 203030311123 is 321113030302.

203030311123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203030311123 is a prime.

It is a super-2 number, since 2×203030311123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203030311123.

It is not a weakly prime, because it can be changed into another prime (203030311163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101515155561 + 101515155562.

It is an arithmetic number, because the mean of its divisors is an integer number (101515155562).

Almost surely, 2^203030311123 is an apocalyptic number.

203030311123 is a deficient number, since it is larger than the sum of its proper divisors (1).

203030311123 is an equidigital number, since it uses as much as digits as its factorization.

203030311123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 203030311123 its reverse (321113030302), we get a palindrome (524143341425).

The spelling of 203030311123 in words is "two hundred three billion, thirty million, three hundred eleven thousand, one hundred twenty-three".