211404323423 has 2 divisors, whose sum is σ = 211404323424. Its totient is φ = 211404323422.

The previous prime is 211404323419. The next prime is 211404323447. The reversal of 211404323423 is 324323404112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211404323423 - 2² = 211404323419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211404323723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105702161711 + 105702161712.

It is an arithmetic number, because the mean of its divisors is an integer number (105702161712).

Almost surely, 2^211404323423 is an apocalyptic number.

211404323423 is a deficient number, since it is larger than the sum of its proper divisors (1).

211404323423 is an equidigital number, since it uses as much as digits as its factorization.

211404323423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 211404323423 its reverse (324323404112), we get a palindrome (535727727535).

The spelling of 211404323423 in words is "two hundred eleven billion, four hundred four million, three hundred twenty-three thousand, four hundred twenty-three".