211302112123 has 2 divisors, whose sum is σ = 211302112124. Its totient is φ = 211302112122.

The previous prime is 211302112103. The next prime is 211302112183. The reversal of 211302112123 is 321211203112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211302112123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211302112123.

It is not a weakly prime, because it can be changed into another prime (211302112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105651056061 + 105651056062.

It is an arithmetic number, because the mean of its divisors is an integer number (105651056062).

Almost surely, 2^211302112123 is an apocalyptic number.

211302112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

211302112123 is an equidigital number, since it uses as much as digits as its factorization.

211302112123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211302112123 its reverse (321211203112), we get a palindrome (532513315235).

The spelling of 211302112123 in words is "two hundred eleven billion, three hundred two million, one hundred twelve thousand, one hundred twenty-three".