203123311301 has 2 divisors, whose sum is σ = 203123311302. Its totient is φ = 203123311300.

The previous prime is 203123311297. The next prime is 203123311331. The reversal of 203123311301 is 103113321302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202774593025 + 348718276 = 450305^2 + 18674^2 .

It is a cyclic number.

It is not a de Polignac number, because 203123311301 - 2² = 203123311297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203123311331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101561655650 + 101561655651.

It is an arithmetic number, because the mean of its divisors is an integer number (101561655651).

Almost surely, 2^203123311301 is an apocalyptic number.

It is an amenable number.

203123311301 is a deficient number, since it is larger than the sum of its proper divisors (1).

203123311301 is an equidigital number, since it uses as much as digits as its factorization.

203123311301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 203123311301 its reverse (103113321302), we get a palindrome (306236632603).

The spelling of 203123311301 in words is "two hundred three billion, one hundred twenty-three million, three hundred eleven thousand, three hundred one".