212221002187 has 2 divisors, whose sum is σ = 212221002188. Its totient is φ = 212221002186.

The previous prime is 212221002179. The next prime is 212221002247. The reversal of 212221002187 is 781200122212.

212221002187 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 is a cyclic number.

It is not a de Polignac number, because 212221002187 - 2³ = 212221002179 is a prime.

It is not a weakly prime, because it can be changed into another prime (212221002127) 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, 106110501093 + 106110501094.

It is an arithmetic number, because the mean of its divisors is an integer number (106110501094).

Almost surely, 2^212221002187 is an apocalyptic number.

212221002187 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221002187 is an equidigital number, since it uses as much as digits as its factorization.

212221002187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 212221002187 its reverse (781200122212), we get a palindrome (993421124399).

The spelling of 212221002187 in words is "two hundred twelve billion, two hundred twenty-one million, two thousand, one hundred eighty-seven".