211123122823 has 2 divisors, whose sum is σ = 211123122824. Its totient is φ = 211123122822.

The previous prime is 211123122811. The next prime is 211123122877. The reversal of 211123122823 is 328221321112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211123122823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211123122791 and 211123122800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211123128823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561561411 + 105561561412.

It is an arithmetic number, because the mean of its divisors is an integer number (105561561412).

Almost surely, 2^211123122823 is an apocalyptic number.

211123122823 is a deficient number, since it is larger than the sum of its proper divisors (1).

211123122823 is an equidigital number, since it uses as much as digits as its factorization.

211123122823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 28.

Adding to 211123122823 its reverse (328221321112), we get a palindrome (539344443935).

The spelling of 211123122823 in words is "two hundred eleven billion, one hundred twenty-three million, one hundred twenty-two thousand, eight hundred twenty-three".