203123010913 has 2 divisors, whose sum is σ = 203123010914. Its totient is φ = 203123010912.

The previous prime is 203123010899. The next prime is 203123010917. The reversal of 203123010913 is 319010321302.

203123010913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152719168849 + 50403842064 = 390793^2 + 224508^2 .

It is a cyclic number.

It is not a de Polignac number, because 203123010913 - 2²¹ = 203120913761 is a prime.

It is not a weakly prime, because it can be changed into another prime (203123010917) 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, 101561505456 + 101561505457.

It is an arithmetic number, because the mean of its divisors is an integer number (101561505457).

Almost surely, 2^203123010913 is an apocalyptic number.

It is an amenable number.

203123010913 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123010913 is an equidigital number, since it uses as much as digits as its factorization.

203123010913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 203123010913 in words is "two hundred three billion, one hundred twenty-three million, ten thousand, nine hundred thirteen".