212012123 has 2 divisors, whose sum is σ = 212012124. Its totient is φ = 212012122.

The previous prime is 212012077. The next prime is 212012197. The reversal of 212012123 is 321210212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212012123 - 2²⁶ = 144903259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212012098 and 212012107.

It is not a weakly prime, because it can be changed into another prime (212015123) 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, 106006061 + 106006062.

It is an arithmetic number, because the mean of its divisors is an integer number (106006062).

Almost surely, 2^212012123 is an apocalyptic number.

212012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012123 is an equidigital number, since it uses as much as digits as its factorization.

212012123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212012123 is about 14560.6360781389. The cubic root of 212012123 is about 596.2845613124.

Adding to 212012123 its reverse (321210212), we get a palindrome (533222335).

The spelling of 212012123 in words is "two hundred twelve million, twelve thousand, one hundred twenty-three".