212121012222187 has 2 divisors, whose sum is σ = 212121012222188. Its totient is φ = 212121012222186.

The previous prime is 212121012222169. The next prime is 212121012222269. The reversal of 212121012222187 is 781222210121212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121012222187 - 2²³ = 212121003833579 is a prime.

It is a super-3 number, since 3×212121012222187³ (a number of 44 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212121012222167) 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, 106060506111093 + 106060506111094.

It is an arithmetic number, because the mean of its divisors is an integer number (106060506111094).

Almost surely, 2^{212121012222187} is an apocalyptic number.

212121012222187 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121012222187 is an equidigital number, since it uses as much as digits as its factorization.

212121012222187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

Adding to 212121012222187 its reverse (781222210121212), we get a palindrome (993343222343399).

The spelling of 212121012222187 in words is "two hundred twelve trillion, one hundred twenty-one billion, twelve million, two hundred twenty-two thousand, one hundred eighty-seven".