12211002221 has 8 divisors (see below), whose sum is σ = 13330632000. Its totient is φ = 11092962240.

The previous prime is 12211002169. The next prime is 12211002263. The reversal of 12211002221 is 12220011221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211002221 - 2³⁰ = 11137260397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211002196 and 12211002205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211001221) 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, 381356 + ... + 412133.

It is an arithmetic number, because the mean of its divisors is an integer number (1666329000).

Almost surely, 2^12211002221 is an apocalyptic number.

12211002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211002221 is a deficient number, since it is larger than the sum of its proper divisors (1119629779).

12211002221 is a wasteful number, since it uses less digits than its factorization.

12211002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794899.

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

Adding to 12211002221 its reverse (12220011221), we get a palindrome (24431013442).

The spelling of 12211002221 in words is "twelve billion, two hundred eleven million, two thousand, two hundred twenty-one".