203111431361 has 2 divisors, whose sum is σ = 203111431362. Its totient is φ = 203111431360.

The previous prime is 203111431307. The next prime is 203111431379. The reversal of 203111431361 is 163134111302.

203111431361 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., 197478028225 + 5633403136 = 444385^2 + 75056^2 .

It is a cyclic number.

It is not a de Polignac number, because 203111431361 - 2⁶ = 203111431297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203111431361.

It is not a weakly prime, because it can be changed into another prime (203111431961) 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, 101555715680 + 101555715681.

It is an arithmetic number, because the mean of its divisors is an integer number (101555715681).

Almost surely, 2^203111431361 is an apocalyptic number.

It is an amenable number.

203111431361 is a deficient number, since it is larger than the sum of its proper divisors (1).

203111431361 is an equidigital number, since it uses as much as digits as its factorization.

203111431361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 203111431361 its reverse (163134111302), we get a palindrome (366245542663).

The spelling of 203111431361 in words is "two hundred three billion, one hundred eleven million, four hundred thirty-one thousand, three hundred sixty-one".