221211201443 has 2 divisors, whose sum is σ = 221211201444. Its totient is φ = 221211201442.

The previous prime is 221211201377. The next prime is 221211201451. The reversal of 221211201443 is 344102112122.

221211201443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211201443 - 2²² = 221207007139 is a prime.

It is not a weakly prime, because it can be changed into another prime (221211201473) 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, 110605600721 + 110605600722.

It is an arithmetic number, because the mean of its divisors is an integer number (110605600722).

Almost surely, 2^221211201443 is an apocalyptic number.

221211201443 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211201443 is an equidigital number, since it uses as much as digits as its factorization.

221211201443 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 221211201443 its reverse (344102112122), we get a palindrome (565313313565).

The spelling of 221211201443 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred one thousand, four hundred forty-three".