203011310321101 has 2 divisors, whose sum is σ = 203011310321102. Its totient is φ = 203011310321100.

The previous prime is 203011310321051. The next prime is 203011310321123. The reversal of 203011310321101 is 101123013110302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191745224784100 + 11266085537001 = 13847210^2 + 3356499^2 .

It is a cyclic number.

It is not a de Polignac number, because 203011310321101 - 2²¹ = 203011308223949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203011310321401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505655160550 + 101505655160551.

It is an arithmetic number, because the mean of its divisors is an integer number (101505655160551).

Almost surely, 2^{203011310321101} is an apocalyptic number.

It is an amenable number.

203011310321101 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011310321101 is an equidigital number, since it uses as much as digits as its factorization.

203011310321101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 203011310321101 its reverse (101123013110302), we get a palindrome (304134323431403).

The spelling of 203011310321101 in words is "two hundred three trillion, eleven billion, three hundred ten million, three hundred twenty-one thousand, one hundred one".