21423425166211 has 2 divisors, whose sum is σ = 21423425166212. Its totient is φ = 21423425166210.

The previous prime is 21423425166191. The next prime is 21423425166337. The reversal of 21423425166211 is 11266152432412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21423425166211 - 2⁷ = 21423425166083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21423425166811) 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, 10711712583105 + 10711712583106.

It is an arithmetic number, because the mean of its divisors is an integer number (10711712583106).

Almost surely, 2^{21423425166211} is an apocalyptic number.

21423425166211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21423425166211 is an equidigital number, since it uses as much as digits as its factorization.

21423425166211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 40.

Adding to 21423425166211 its reverse (11266152432412), we get a palindrome (32689577598623).

The spelling of 21423425166211 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-five million, one hundred sixty-six thousand, two hundred eleven".