201010210102181 has 2 divisors, whose sum is σ = 201010210102182. Its totient is φ = 201010210102180.

The previous prime is 201010210102133. The next prime is 201010210102211. The reversal of 201010210102181 is 181201012010102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192511906517956 + 8498303584225 = 13874866^2 + 2915185^2 .

It is a cyclic number.

It is not a de Polignac number, because 201010210102181 - 2³⁴ = 200993030232997 is a prime.

It is a super-4 number, since 4×201010210102181⁴ (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 (201010210402181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100505105051090 + 100505105051091.

It is an arithmetic number, because the mean of its divisors is an integer number (100505105051091).

Almost surely, 2^{201010210102181} is an apocalyptic number.

It is an amenable number.

201010210102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

201010210102181 is an equidigital number, since it uses as much as digits as its factorization.

201010210102181 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 20.

Adding to 201010210102181 its reverse (181201012010102), we get a palindrome (382211222112283).

The spelling of 201010210102181 in words is "two hundred one trillion, ten billion, two hundred ten million, one hundred two thousand, one hundred eighty-one".