203101313081 has 2 divisors, whose sum is σ = 203101313082. Its totient is φ = 203101313080.

The previous prime is 203101313069. The next prime is 203101313111. The reversal of 203101313081 is 180313101302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132190416400 + 70910896681 = 363580^2 + 266291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203101313081 is a prime.

It is a super-2 number, since 2×203101313081² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (203101313011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101550656540 + 101550656541.

It is an arithmetic number, because the mean of its divisors is an integer number (101550656541).

Almost surely, 2^203101313081 is an apocalyptic number.

It is an amenable number.

203101313081 is a deficient number, since it is larger than the sum of its proper divisors (1).

203101313081 is an equidigital number, since it uses as much as digits as its factorization.

203101313081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 203101313081 its reverse (180313101302), we get a palindrome (383414414383).

The spelling of 203101313081 in words is "two hundred three billion, one hundred one million, three hundred thirteen thousand, eighty-one".