221232420111 has 16 divisors (see below), whose sum is σ = 304507081728. Its totient is φ = 142723492800.

The previous prime is 221232420083. The next prime is 221232420113. The reversal of 221232420111 is 111024232122.

It is a happy number.

It is not a de Polignac number, because 221232420111 - 2¹³ = 221232411919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232420113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2340691 + ... + 2433371.

It is an arithmetic number, because the mean of its divisors is an integer number (19031692608).

Almost surely, 2^221232420111 is an apocalyptic number.

221232420111 is a deficient number, since it is larger than the sum of its proper divisors (83274661617).

221232420111 is a wasteful number, since it uses less digits than its factorization.

221232420111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118382.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221232420111 its reverse (111024232122), we get a palindrome (332256652233).

The spelling of 221232420111 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred twenty thousand, one hundred eleven".