201000012102181 has 2 divisors, whose sum is σ = 201000012102182. Its totient is φ = 201000012102180.

The previous prime is 201000012102161. The next prime is 201000012102347. The reversal of 201000012102181 is 181201210000102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192544763602500 + 8455248499681 = 13876050^2 + 2907791^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000012102181 - 2³⁵ = 200965652363813 is a prime.

It is a super-4 number, since 4×201000012102181⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201000012102161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500006051090 + 100500006051091.

It is an arithmetic number, because the mean of its divisors is an integer number (100500006051091).

Almost surely, 2^{201000012102181} is an apocalyptic number.

It is an amenable number.

201000012102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000012102181 is an equidigital number, since it uses as much as digits as its factorization.

201000012102181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201000012102181 its reverse (181201210000102), we get a palindrome (382201222102283).

The spelling of 201000012102181 in words is "two hundred one trillion, twelve million, one hundred two thousand, one hundred eighty-one".