12211120221 has 4 divisors (see below), whose sum is σ = 16281493632. Its totient is φ = 8140746812.

The previous prime is 12211120199. The next prime is 12211120237. The reversal of 12211120221 is 12202111221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12211120221 - 2⁶ = 12211120157 is a prime.

It is a super-2 number, since 2×12211120221² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211120021) 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, 2035186701 + ... + 2035186706.

It is an arithmetic number, because the mean of its divisors is an integer number (4070373408).

Almost surely, 2^12211120221 is an apocalyptic number.

It is an amenable number.

12211120221 is a deficient number, since it is larger than the sum of its proper divisors (4070373411).

12211120221 is an equidigital number, since it uses as much as digits as its factorization.

12211120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070373410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211120221 its reverse (12202111221), we get a palindrome (24413231442).

The spelling of 12211120221 in words is "twelve billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".