12100333221 has 24 divisors (see below), whose sum is σ = 17970068064. Its totient is φ = 7840372320.

The previous prime is 12100333213. The next prime is 12100333241. The reversal of 12100333221 is 12233300121.

12100333221 is a `hidden beast` number, since 12 + 100 + 333 + 221 = 666.

It is not a de Polignac number, because 12100333221 - 2³ = 12100333213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12100333194 and 12100333203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100333241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296166 + ... + 334536.

It is an arithmetic number, because the mean of its divisors is an integer number (748752836).

Almost surely, 2^12100333221 is an apocalyptic number.

It is an amenable number.

12100333221 is a deficient number, since it is larger than the sum of its proper divisors (5869734843).

12100333221 is a wasteful number, since it uses less digits than its factorization.

12100333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39361 (or 39358 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12100333221 its reverse (12233300121), we get a palindrome (24333633342).

The spelling of 12100333221 in words is "twelve billion, one hundred million, three hundred thirty-three thousand, two hundred twenty-one".