12201021211 has 4 divisors (see below), whose sum is σ = 12201473152. Its totient is φ = 12200569272.

The previous prime is 12201021187. The next prime is 12201021229. The reversal of 12201021211 is 11212010221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12201021211 - 2¹¹ = 12201019163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201021191 and 12201021200.

It is not an unprimeable number, because it can be changed into a prime (12201021271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182715 + ... + 240388.

It is an arithmetic number, because the mean of its divisors is an integer number (3050368288).

Almost surely, 2^12201021211 is an apocalyptic number.

12201021211 is a deficient number, since it is larger than the sum of its proper divisors (451941).

12201021211 is an equidigital number, since it uses as much as digits as its factorization.

12201021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451940.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12201021211 its reverse (11212010221), we get a palindrome (23413031432).

The spelling of 12201021211 in words is "twelve billion, two hundred one million, twenty-one thousand, two hundred eleven".