203111333320081 has 2 divisors, whose sum is σ = 203111333320082. Its totient is φ = 203111333320080.

The previous prime is 203111333320067. The next prime is 203111333320163. The reversal of 203111333320081 is 180023333111302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112254215710081 + 90857117610000 = 10595009^2 + 9531900^2 .

It is a cyclic number.

It is not a de Polignac number, because 203111333320081 - 2¹³ = 203111333311889 is a prime.

It is a super-2 number, since 2×203111333320081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203111333320001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101555666660040 + 101555666660041.

It is an arithmetic number, because the mean of its divisors is an integer number (101555666660041).

Almost surely, 2^{203111333320081} is an apocalyptic number.

It is an amenable number.

203111333320081 is a deficient number, since it is larger than the sum of its proper divisors (1).

203111333320081 is an equidigital number, since it uses as much as digits as its factorization.

203111333320081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 203111333320081 its reverse (180023333111302), we get a palindrome (383134666431383).

The spelling of 203111333320081 in words is "two hundred three trillion, one hundred eleven billion, three hundred thirty-three million, three hundred twenty thousand, eighty-one".