221423233312 has 24 divisors (see below), whose sum is σ = 436016101500. Its totient is φ = 110688985344.

The previous prime is 221423233271. The next prime is 221423233349. The reversal of 221423233312 is 213332324122.

It can be written as a sum of positive squares in 2 ways, for example, as 198912432016 + 22510801296 = 445996^2 + 150036^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547687 + ... + 861862.

Almost surely, 2^221423233312 is an apocalyptic number.

It is an amenable number.

221423233312 is a deficient number, since it is larger than the sum of its proper divisors (214592868188).

221423233312 is a wasteful number, since it uses less digits than its factorization.

221423233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414468 (or 1414460 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

Adding to 221423233312 its reverse (213332324122), we get a palindrome (434755557434).

The spelling of 221423233312 in words is "two hundred twenty-one billion, four hundred twenty-three million, two hundred thirty-three thousand, three hundred twelve".