201024040181 has 2 divisors, whose sum is σ = 201024040182. Its totient is φ = 201024040180.

The previous prime is 201024040177. The next prime is 201024040183. The reversal of 201024040181 is 181040420102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138856097956 + 62167942225 = 372634^2 + 249335^2 .

It is a cyclic number.

It is not a de Polignac number, because 201024040181 - 2² = 201024040177 is a prime.

It is a super-2 number, since 2×201024040181² (a number of 23 digits) contains 22 as substring.

Together with 201024040183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201024040183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100512020090 + 100512020091.

It is an arithmetic number, because the mean of its divisors is an integer number (100512020091).

Almost surely, 2^201024040181 is an apocalyptic number.

It is an amenable number.

201024040181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201024040181 is an equidigital number, since it uses as much as digits as its factorization.

201024040181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 201024040181 its reverse (181040420102), we get a palindrome (382064460283).

The spelling of 201024040181 in words is "two hundred one billion, twenty-four million, forty thousand, one hundred eighty-one".