12221010221 has 12 divisors (see below), whose sum is σ = 14137227552. Its totient is φ = 10348904136.

The previous prime is 12221010199. The next prime is 12221010223. The reversal of 12221010221 is 12201012221.

It is not a de Polignac number, because 12221010221 - 2³⁰ = 11147268397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12221010196 and 12221010205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221010223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78491 + ... + 174936.

It is an arithmetic number, because the mean of its divisors is an integer number (1178102296).

Almost surely, 2^12221010221 is an apocalyptic number.

It is an amenable number.

12221010221 is a deficient number, since it is larger than the sum of its proper divisors (1916217331).

12221010221 is an frugal number, since it uses more digits than its factorization.

12221010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253600 (or 253517 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12221010221 its reverse (12201012221), we get a palindrome (24422022442).

The spelling of 12221010221 in words is "twelve billion, two hundred twenty-one million, ten thousand, two hundred twenty-one".