221430421211 has 2 divisors, whose sum is σ = 221430421212. Its totient is φ = 221430421210.

The previous prime is 221430421183. The next prime is 221430421271. The reversal of 221430421211 is 112124034122.

221430421211 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 221430421211 - 2²⁶ = 221363312347 is a prime.

It is not a weakly prime, because it can be changed into another prime (221430421271) 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, 110715210605 + 110715210606.

It is an arithmetic number, because the mean of its divisors is an integer number (110715210606).

Almost surely, 2^221430421211 is an apocalyptic number.

221430421211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221430421211 is an equidigital number, since it uses as much as digits as its factorization.

221430421211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 221430421211 its reverse (112124034122), we get a palindrome (333554455333).

The spelling of 221430421211 in words is "two hundred twenty-one billion, four hundred thirty million, four hundred twenty-one thousand, two hundred eleven".