12111010221 has 16 divisors (see below), whose sum is σ = 16218498240. Its totient is φ = 8038842240.

The previous prime is 12111010201. The next prime is 12111010253. The reversal of 12111010221 is 12201011121.

It is not a de Polignac number, because 12111010221 - 2¹⁴ = 12110993837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111010197 and 12111010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111010201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645651 + ... + 664143.

It is an arithmetic number, because the mean of its divisors is an integer number (1013656140).

Almost surely, 2^12111010221 is an apocalyptic number.

It is an amenable number.

12111010221 is a deficient number, since it is larger than the sum of its proper divisors (4107488019).

12111010221 is a wasteful number, since it uses less digits than its factorization.

12111010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19436.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12111010221 its reverse (12201011121), we get a palindrome (24312021342).

The spelling of 12111010221 in words is "twelve billion, one hundred eleven million, ten thousand, two hundred twenty-one".