221211430443 has 12 divisors (see below), whose sum is σ = 319532426928. Its totient is φ = 147472069200.

The previous prime is 221211430423. The next prime is 221211430459. The reversal of 221211430443 is 344034112122.

221211430443 is a `hidden beast` number, since 2 + 2 + 1 + 211 + 4 + 3 + 0 + 443 = 666.

It is not a de Polignac number, because 221211430443 - 2¹⁰ = 221211429419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211430423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641221 + ... + 923897.

It is an arithmetic number, because the mean of its divisors is an integer number (26627702244).

Almost surely, 2^221211430443 is an apocalyptic number.

221211430443 is a deficient number, since it is larger than the sum of its proper divisors (98320996485).

221211430443 is a wasteful number, since it uses less digits than its factorization.

221211430443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369634 (or 369631 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 221211430443 its reverse (344034112122), we get a palindrome (565245542565).

The spelling of 221211430443 in words is "two hundred twenty-one billion, two hundred eleven million, four hundred thirty thousand, four hundred forty-three".