212323200181 has 2 divisors, whose sum is σ = 212323200182. Its totient is φ = 212323200180.

The previous prime is 212323200161. The next prime is 212323200223. The reversal of 212323200181 is 181002323212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190606462225 + 21716737956 = 436585^2 + 147366^2 .

It is a cyclic number.

It is not a de Polignac number, because 212323200181 - 2³¹ = 210175716533 is a prime.

It is a super-2 number, since 2×212323200181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212323200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106161600090 + 106161600091.

It is an arithmetic number, because the mean of its divisors is an integer number (106161600091).

Almost surely, 2^212323200181 is an apocalyptic number.

It is an amenable number.

212323200181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212323200181 is an equidigital number, since it uses as much as digits as its factorization.

212323200181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 212323200181 its reverse (181002323212), we get a palindrome (393325523393).

The spelling of 212323200181 in words is "two hundred twelve billion, three hundred twenty-three million, two hundred thousand, one hundred eighty-one".