212124191 has 2 divisors, whose sum is σ = 212124192. Its totient is φ = 212124190.

The previous prime is 212124173. The next prime is 212124229. The reversal of 212124191 is 191421212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212124191 - 2⁶ = 212124127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212124131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106062095 + 106062096.

It is an arithmetic number, because the mean of its divisors is an integer number (106062096).

Almost surely, 2^212124191 is an apocalyptic number.

212124191 is a deficient number, since it is larger than the sum of its proper divisors (1).

212124191 is an equidigital number, since it uses as much as digits as its factorization.

212124191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 23.

The square root of 212124191 is about 14564.4838906156. The cubic root of 212124191 is about 596.3896066378.

It can be divided in two parts, 21 and 2124191, that added together give a palindrome (2124212).

The spelling of 212124191 in words is "two hundred twelve million, one hundred twenty-four thousand, one hundred ninety-one".