221311133212 has 24 divisors (see below), whose sum is σ = 417816871472. Its totient is φ = 101964700800.

The previous prime is 221311133189. The next prime is 221311133213. The reversal of 221311133212 is 212331113122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221311133213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3697089 + ... + 3756472.

Almost surely, 2^221311133212 is an apocalyptic number.

It is an amenable number.

221311133212 is a deficient number, since it is larger than the sum of its proper divisors (196505738260).

221311133212 is a wasteful number, since it uses less digits than its factorization.

221311133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7454149 (or 7454147 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 221311133212 its reverse (212331113122), we get a palindrome (433642246334).

The spelling of 221311133212 in words is "two hundred twenty-one billion, three hundred eleven million, one hundred thirty-three thousand, two hundred twelve".