221443540211 has 32 divisors (see below), whose sum is σ = 236942798400. Its totient is φ = 206363566080.

The previous prime is 221443540189. The next prime is 221443540261. The reversal of 221443540211 is 112045344122.

It is a happy number.

It is not a de Polignac number, because 221443540211 - 2¹⁴ = 221443523827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221443540261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226656155 + ... + 226657131.

It is an arithmetic number, because the mean of its divisors is an integer number (7404462450).

Almost surely, 2^221443540211 is an apocalyptic number.

221443540211 is a deficient number, since it is larger than the sum of its proper divisors (15499258189).

221443540211 is a wasteful number, since it uses less digits than its factorization.

221443540211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 221443540211 its reverse (112045344122), we get a palindrome (333488884333).

The spelling of 221443540211 in words is "two hundred twenty-one billion, four hundred forty-three million, five hundred forty thousand, two hundred eleven".