211213030123 has 2 divisors, whose sum is σ = 211213030124. Its totient is φ = 211213030122.

The previous prime is 211213030109. The next prime is 211213030141. The reversal of 211213030123 is 321030312112.

211213030123 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 211213030123 - 2⁹ = 211213029611 is a prime.

It is a super-2 number, since 2×211213030123² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211213030123.

It is not a weakly prime, because it can be changed into another prime (211213031123) 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, 105606515061 + 105606515062.

It is an arithmetic number, because the mean of its divisors is an integer number (105606515062).

Almost surely, 2^211213030123 is an apocalyptic number.

211213030123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211213030123 is an equidigital number, since it uses as much as digits as its factorization.

211213030123 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 211213030123 its reverse (321030312112), we get a palindrome (532243342235).

The spelling of 211213030123 in words is "two hundred eleven billion, two hundred thirteen million, thirty thousand, one hundred twenty-three".