210001112202181 has 2 divisors, whose sum is σ = 210001112202182. Its totient is φ = 210001112202180.

The previous prime is 210001112202163. The next prime is 210001112202199. The reversal of 210001112202181 is 181202211100012.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (210001112202163) and next prime (210001112202199).

It can be written as a sum of positive squares in only one way, i.e., 209660727471556 + 340384730625 = 14479666^2 + 583425^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001112202181 - 2⁷ = 210001112202053 is a prime.

It is a super-2 number, since 2×210001112202181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210001112802181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000556101090 + 105000556101091.

It is an arithmetic number, because the mean of its divisors is an integer number (105000556101091).

Almost surely, 2^{210001112202181} is an apocalyptic number.

It is an amenable number.

210001112202181 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001112202181 is an equidigital number, since it uses as much as digits as its factorization.

210001112202181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 210001112202181 its reverse (181202211100012), we get a palindrome (391203323302193).

The spelling of 210001112202181 in words is "two hundred ten trillion, one billion, one hundred twelve million, two hundred two thousand, one hundred eighty-one".