212203231181 has 2 divisors, whose sum is σ = 212203231182. Its totient is φ = 212203231180.

The previous prime is 212203231159. The next prime is 212203231297. The reversal of 212203231181 is 181132302212.

212203231181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210764546281 + 1438684900 = 459091^2 + 37930^2 .

It is a cyclic number.

It is not a de Polignac number, because 212203231181 - 2¹⁰ = 212203230157 is a prime.

It is a super-2 number, since 2×212203231181² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212203231181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212203231111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101615590 + 106101615591.

It is an arithmetic number, because the mean of its divisors is an integer number (106101615591).

Almost surely, 2^212203231181 is an apocalyptic number.

It is an amenable number.

212203231181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212203231181 is an equidigital number, since it uses as much as digits as its factorization.

212203231181 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 26.

Adding to 212203231181 its reverse (181132302212), we get a palindrome (393335533393).

The spelling of 212203231181 in words is "two hundred twelve billion, two hundred three million, two hundred thirty-one thousand, one hundred eighty-one".