12210133221 has 36 divisors (see below), whose sum is σ = 20834102016. Its totient is φ = 6830834400.

The previous prime is 12210133217. The next prime is 12210133231. The reversal of 12210133221 is 12233101221.

It is not a de Polignac number, because 12210133221 - 2² = 12210133217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12210133194 and 12210133203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210133231) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 348165 + ... + 381626.

It is an arithmetic number, because the mean of its divisors is an integer number (578725056).

Almost surely, 2^12210133221 is an apocalyptic number.

12210133221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210133221 is a deficient number, since it is larger than the sum of its proper divisors (8623968795).

12210133221 is a wasteful number, since it uses less digits than its factorization.

12210133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729834 (or 729818 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12210133221 its reverse (12233101221), we get a palindrome (24443234442).

The spelling of 12210133221 in words is "twelve billion, two hundred ten million, one hundred thirty-three thousand, two hundred twenty-one".