201330432181 has 2 divisors, whose sum is σ = 201330432182. Its totient is φ = 201330432180.

The previous prime is 201330432179. The next prime is 201330432209. The reversal of 201330432181 is 181234033102.

201330432181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (201330432209) can be obtained adding 201330432181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182123244081 + 19207188100 = 426759^2 + 138590^2 .

It is a cyclic number.

It is not a de Polignac number, because 201330432181 - 2¹ = 201330432179 is a prime.

It is a super-2 number, since 2×201330432181² (a number of 23 digits) contains 22 as substring.

Together with 201330432179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201330432781) 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, 100665216090 + 100665216091.

It is an arithmetic number, because the mean of its divisors is an integer number (100665216091).

Almost surely, 2^201330432181 is an apocalyptic number.

It is an amenable number.

201330432181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201330432181 is an equidigital number, since it uses as much as digits as its factorization.

201330432181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 201330432181 its reverse (181234033102), we get a palindrome (382564465283).

The spelling of 201330432181 in words is "two hundred one billion, three hundred thirty million, four hundred thirty-two thousand, one hundred eighty-one".