221221234232 has 16 divisors (see below), whose sum is σ = 414927252600. Its totient is φ = 110573966880.

The previous prime is 221221234231. The next prime is 221221234253. The reversal of 221221234232 is 232432122122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221221234231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555619 + ... + 4603922.

Almost surely, 2^221221234232 is an apocalyptic number.

It is an amenable number.

221221234232 is a deficient number, since it is larger than the sum of its proper divisors (193706018368).

221221234232 is a wasteful number, since it uses less digits than its factorization.

221221234232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162566 (or 9162562 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 221221234232 its reverse (232432122122), we get a palindrome (453653356354).

The spelling of 221221234232 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-four thousand, two hundred thirty-two".