203023201081 has 2 divisors, whose sum is σ = 203023201082. Its totient is φ = 203023201080.

The previous prime is 203023201079. The next prime is 203023201133. The reversal of 203023201081 is 180102320302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200220451600 + 2802749481 = 447460^2 + 52941^2 .

It is a cyclic number.

It is not a de Polignac number, because 203023201081 - 2¹ = 203023201079 is a prime.

It is a super-2 number, since 2×203023201081² (a number of 23 digits) contains 22 as substring.

Together with 203023201079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (203023201681) 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, 101511600540 + 101511600541.

It is an arithmetic number, because the mean of its divisors is an integer number (101511600541).

Almost surely, 2^203023201081 is an apocalyptic number.

It is an amenable number.

203023201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

203023201081 is an equidigital number, since it uses as much as digits as its factorization.

203023201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 203023201081 its reverse (180102320302), we get a palindrome (383125521383).

The spelling of 203023201081 in words is "two hundred three billion, twenty-three million, two hundred one thousand, eighty-one".