212123030311 has 2 divisors, whose sum is σ = 212123030312. Its totient is φ = 212123030310.

The previous prime is 212123030297. The next prime is 212123030377. The reversal of 212123030311 is 113030321212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212123030311 - 2⁹ = 212123029799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212123030011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061515155 + 106061515156.

It is an arithmetic number, because the mean of its divisors is an integer number (106061515156).

Almost surely, 2^212123030311 is an apocalyptic number.

212123030311 is a deficient number, since it is larger than the sum of its proper divisors (1).

212123030311 is an equidigital number, since it uses as much as digits as its factorization.

212123030311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212123030311 its reverse (113030321212), we get a palindrome (325153351523).

The spelling of 212123030311 in words is "two hundred twelve billion, one hundred twenty-three million, thirty thousand, three hundred eleven".